Answer: The rows of the periodic table represent the highest energy level of that element.
The columns represent how many valence electrons that element has.
Groups are the same thing as columns, they represent how many valence electrons am element has.
The blocks of the periodic table represent what sublevel(s) the valence electrons fill.
Explanation: Yes
Answer:
I can help!
Explanation:
Blocks
Atomic symbol is the one- or two-letter symbol for each element.
Atomic number is the number of protons in the nucleus, which determines the order of elements on the periodic table. This is also the total number of electrons in neutral atoms of the element.
Atomic mass is the mass in grams of 1 mole of atoms. Note that 1 mole contains 6.022·1023 atoms.
Groups
The first two groups of the periodic table(Alkali metals and Alkali Earth metals) are the s-block. Note that helium, in the last column of the table, is also part of the s-block. The outermost electrons of these elements are in s orbitals.
The transition metals make up the d-block, with electrons filling d orbitals. The lanthanides and actinides make up the f-block, with electrons filling f orbitals.
Groups 13 through 18,(post transition metals, metalloids, Reactive nonmetals, and Noble gases-)except for helium, make up the p-block. The outermost electrons of these elements are in p orbitals.
Sections
Metals are more likely to lose valence electrons
nonmetals are more likely to accept electrons.
Metalloids may act like metals or nonmetals, either losing or gaining valence electrons depending on the situation.
Transition metals(groups 3-12) behave somewhat differently because they can lose electrons from their outermost s or d orbitals.
Noble gases are the elements in group 18 that don’t tend to react with other elements. Noble gases have completely filled outer electron shells, as you can see because they’re at the end of each period. The electrons in these elements are stable, making the elements unreactive.
Periods and Groups
Groups of elements have similar properties in terms of how they react with other elements.
All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor.
Hope this helps!!
Which of the following is a correctly written chemical equation that demonstrates the conservation of mass?
O A. H2 + O2 + H2O
B. Mg + HCl + H2 + MgCl2
C. KC 103 → KC1 + O2
OD. H2O + CO2 + H2CO3
Answer:
Option D is correct.
H₂O + CO₂ → H₂CO₃
Explanation:
First of all we will get to know what law of conservation of mass states.
According to this law, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
Example:
6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂
there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.
Now we will apply this law to given chemical equations:
A) H₂ + O₂ → H₂O
There are two hydrogen and two oxygen atoms present on left side while on right side only one oxygen and two hydrogen atoms are present so mass in not conserved. This equation not follow the law of conservation of mass.
B) Mg + HCl → H₂ + MgCl₂
In this equation one Mg, one H and one Cl atoms are present on left side while on right side two hydrogen, one Mg and two chlorine atoms are present. This equation also not follow the law of conservation of mass.
C) KClO₃ → KCl + O₂
There are one K, one Cl and three O atoms are present on left side of chemical equation while on right side one K one Cl and two oxygen atoms are present. This equation also not following the law of conservation of mass.
D) H₂O + CO₂ → H₂CO₃
There are two hydrogen, one carbon and three oxygen atoms are present on both side of equation thus, mass remain conserved. Thus is correct option.
The chemical reaction that follows the conservation of mass has been the formation of hydrogen carbonate. Thus, option D is correct.
The conservation of mass states that the mass of the reactant and products has been equal. The mass can be calculated in terms of the number of atoms.
(A) [tex]\rm H_2\;+\;O_2\;\rightarrow\;H_2O[/tex]
The number of atoms of Hydrogen:
Reactant = 2
Product = 2
The number of atoms of Oxygen:
Reactant = 2
Product = 1
The number of atoms of products and reactant is not equal, Thus, the reaction did not follow the conservation of mass.
(B) [tex]\rm Mg\;+\;HCl\;\rightarrow\;H_2\;+\;MgCl_2[/tex]
The number of atoms of Mg:
Reactant = 1
Product = 1
The number of atoms of H:
Reactant = 1
Product = 2
The number of atoms of Cl:
Reactant = 1
Product = 2
The number of atoms of products and reactant is not equal, Thus, the reaction did not follow the conservation of mass.
(C) [tex]\rm KClO_3\;\rightarrow\;KCl\;+\;O_2[/tex]
The number of atoms of K:
Reactant = 1
Product = 1
The number of atoms of Cl:
Reactant = 1
Product = 1
The number of atoms of O:
Reactant = 3
Product = 2
The number of atoms of products and reactant is not equal, Thus, the reaction did not follow the conservation of mass.
(D) [tex]\rm H_2O\;+\;CO_2\;\rightarrow\;H_2CO_3[/tex]
The number of atoms of H:
Reactant = 2
Product = 2
The number of atoms of O:
Reactant = 3
Product = 3
The number of atoms of C:
Reactant = 1
Product = 1
The number of atoms of products and reactant is equal, Thus, the reaction follows the conservation of mass.
The chemical reaction that follows the conservation of mass has been the formation of hydrogen carbonate. Thus, option D is correct.
For more information about the chemical reaction, refer to the link:
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Which physical property of aluminum allows it to be formed into thin sheets?
O A. Electrical conductivity
O B. Thermal conductivity
O C. Malleability
O D. Density
Answer:
C. Malleability
Explanation:
The malleability of aluminum allows it to be formed into thin sheets.
Physical properties tells us about what a substance is when no change is occurring to its constituents.
Aluminum like some other metals can be drawn into sheets. This is due to the metallic bonds joining atoms of metals and alloys together. The physical properties of metals are due to metallic bonds. The metallic bond is actually the attraction between the positive nuclei of all closely packed atoms in the lattice and the electron cloud jointly formed by all the atoms by losing their outermost shell electrons.Answer:
C
Explanation:
Write the chemical formula for Calcium Dichromate
Ca Cr2O7^2 -
2 2
2 2
1 1
=CaCr2O7^2 -
Is this right? Or does the second part have a bracket
Answer:
Its right
Explanation:
The chemical formula of calcium dichromate is CaCr207
Boron
B
10.811
Number of neutrons
Answer:
6
Explanation:
To determine the number of neutrons we round 10.8 to 11 and subtract the atomic number (5) and get 6; therefore, boron has 6 neutrons.
What is the Albedo of Earth?
Group of answer choices
The energy that is absorbed into Earth.
The energy that is reflected back into space from Earth.
Just a cool word.
Minion talk for energy.
SCIENCE
6TH GRADE
BRAINLIEST!!
Answer: Earth's average albedo is about 0.3. In other words, about 30 percent of incoming solar radiation is reflected back into space and 70 percent is absorbed. A sensor aboard NASA's Terra satellite is now collecting detailed measurements of how much sunlight the earth's surface reflects back up into the atmosphere.
Explanation: ik im annoying thanks
What are the particles that are found in the nucleus of an atom
Answer:
Protons and Neutrons
Explanation:
00
P: 7
N: 78
What is the name of the element in this diagram?
O Boron
O silicon
O nitrogen
oxygen
Answer:
Nitrogen
Explanation:
:) pls mark brainliest
Answer:
Nitrogen
Explanation:
To find your answer, pay attention to the number of protons. Protons define an element's atomic number.
I NEED HELP ASAP PLEASE TO WILL GIVE YOU A BRAINLEST
Answer:
Gravity
Explanation:
According to Newton's Law of Gravity, an object with mass will attract another object with mass.
A spectral line is read
to have a wavelength of 4700A. What is
this in meters?
Answer:
[tex]4.7 * 10^{-7} meters[/tex]
Explanation:
Angstrom can be defined as a metric unit of length for used for the measurement of the wavelength of light (optics) such as visible light, x-rays, ultraviolet light, gamma rays etc. The symbol for Angstrom is "A" and it is named after the 19th century physicist from Sweden, named Anders Jonas Angstrom.
Given the following data;
Wavelength of spectral line = 4700A
To convert this value to meters;
One Angstrom is mathematically equal to [tex] 10^{-10} meters [/tex]
[tex] 1 Angstrom = 10^{-10} meters[/tex]
[tex] 4700 Angstrom = X \; meters[/tex]
Cross multiplying, we have;
[tex] X = 4700 * 10^{-10}[/tex]
X = [tex]4.7 * 10^{-7} meters[/tex]
Therefore, 4700A is equal to 4.7e-7 or 0.00000047 meters.
Please help it’s due today, I will give brainliest
the two middle ones is the answer
No, since the slopes are different.
Yes, since the slopes are the same and the y-intercepts are the same.
Yes, since the slopes are the same and the y-intercepts are different.
No, since the y-intercepts are different.
Option C, slopes are same but y intercepts are different is the correct answer
the term “ The Universe “refers to ?
Answer:
everything including the space...
hope it helps...
In the compound nickel(II) sulfide, there is always 58.7 g of nickel for every 32.1 g of sulfur. What is the simplified ratio of
nickel to sulfur?
answer: 1.83 to 1
or at least that’s what i got
convert 250cm³ to m³
Answer:
0.00025 m3
Explanation:
it just is; used conversion table
5. Complete and balance an equation for each reaction:
CaI₂ + Hg(NO₃)₂ ---------> (HgI₂ precipitates)
Al + Cl₂ --------->
Ag + HCl ------->
C₂H₂ + O₂ ------->
MgCl₂ --------->
CaI₂ + Hg(NO₃)₂ --------->HgI₂ + Ca(NO3)2
2Al + 3Cl₂ --------->2AlCl3
Ag + HCl ------->AgCl + H2
C2H2 + 5O2 --------> 4CO2 + 2H2O
MgCl₂ --------->Mg + Cl2
Please Heeelp!!
Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical equation. Be sure the equation you submit is balanced. (You can edit both sides of the equation to balance it, if you need to.)
Note: you are writing the molecular, and not the net ionic equation.
___---> Ca(ClO)2 (aq) + H2O
2 HClO(aq) + Ca(OH)2(aq) = 2 H2O(l) + Ca(ClO)2(aq) is the balanced equation
If you change number of neutrons in an atom, you will also change its-
Answer:
atomic mass. You will have created an isotope.
Explanation:
indicate whether the statement is true or false a change of state is a chemical change because ice and water do not resemble one another
Answer:
False. Chemical changes are always physical changes
Answer:
False
Explanation:
5. What is the volume of a sample of metal with a mass of 220 grams and a density of 11 grams per
cubic centimeter?
(1 Point)
a:2420 cubic centimeters
b:231 cubic centimeters
c:20 cubic centimeters
d:0.25 cubic centimeters
pls answer fast
Answer:
The answer is option CExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
So we have
[tex]volume = \frac{220}{11} \\ [/tex]
We have the final answer as
20 cm³Hope this helps you
When a trumpet was played, a nearby sheet of paper began to move.
What caused the paper to move? *
Answer:
Air from the trumpet moved it
Explanation:
HURRY ⚠️
How many Chlorine atoms in 2HCI?
Hiw many Hydrogen atoms are in 2HCl?
Answer:
2 in each
Explanation:
What is the definition Of prokaryote and give me a sentence that explain its so definition Adn the sentence
Answer:
Explanation:
Definition of Prokaryote. a single-celled organism (such as bacteria) that lacks a nucleus and cannot be seen with the naked eye. Examples of Prokaryote in a sentence. 1. The scientist studied the prokaryote under the microscope to see if its single-cell would multiply in certain conditions.
Hope this helps!
Prokaryotes are a single celled organism that is microscopic. They do not have a distinct nucleus with a membrane. They don't have other specialized organelles either. They also include bacteria and archaea.
"Prokaryotes are so small you cant see them with the bare human eye!"
[tex]\boxed{I\;hope\;it\;helps!}[/tex]
<3
How does the disorder of a gas compare to that of a
liquid or solid?
Answer:The atoms in gases are far apart from each other, so they are much more disordered than either liquids or solids.
Explanation:
What is the average acceleration from 0 seconds to 4 seconds
Answer:
1
Explanation:
you would take 4 subtract 0 which is 4 and divide it by 4 which is 1
Fill in the blank. The amount which an object accelerates
depends on the mass of the object and on the size of the
acting upon it.
gravity
velocity
inertia
force
Answer: the answer is force
Explanation:
May I have some salt? (What is salt consisted of?)
Answer: Salt is primarily composed of sodium chloride.
Explanation:
write the electronic configuration of oxygen on the basis of sub shell.
Answer:
[He] 2s² 2p⁴
Explanation:
If you're looking for the answer in subshell form, here it is:
[tex]1sx^{2} 2sx^{2} px^{4} (2.6)[/tex]
Quote:
"Where I walk, I walk alone. Where I fight, I fight alone."
- Akuma
Which of these outdoor activities would you most likely participate in during the winter?
A.
hacer una barbacoa
B.
organizar un picnic
C.
nadar en la piscina
D.
ir a esquiar
Answer:
D.
Explanation:
Translation:
A. make a barbecue
B. organize a picnic
C. swimming in the pool
D. to go skiing
Barbecue is usually a summer activity, so we eliminate that.
It would be too cold for a picnic!
It would be too cold to go swimming, and that's more of a summer thing!
Skiing is a snow activity, and since it is winter, it is likely to know.
Fluorine(F), Chlorine(Cl), Bromine(Br), and Lodine(I) are elements in the same group on the periodic table. Why are these elements grouped together?
A. They all have similar properties
B. They all have similar atomic masses
C. They all have the same atomic radius
D. They all have the name number of protons
Answer:
The answer is A
Explanation:
My teacher gave me the answer before the test that we took on 11/12/2020
Hope this helps anyone else who has the same question.
The halogens have similar properties, the correct option is A.
What are Halogens?Halogens are the group 17th compound of the periodic table, It consists of elements like Fluorine(F), Chlorine(Cl), Bromine(Br), and Lodine(I).
The halogens have the following properties.
They all react with hydrogen to create acids.
All of them are fairly harmful.
Salts are easily formed when they react with metals.
Their outer shell contains seven valence electrons.
They are electronegative and very reactive.
Low melting and boiling points characterize the halogens. This is a common characteristic of non-metals.
As you move lower in the group, the melting and boiling points then rise.
The elements have different atomic mass, atomic radius, and a different number of protons.
They are grouped together because they all have similar properties.
To know more about Halogens
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Which option is an example of a physical property?
A. conductivity
B. pH
C. reactivity
D. rusting ability
physical property is conductivity