The trends in electron configuration in the periodic table can be explained in the given way.
The number of valence electrons:
Increases from left to right across a period.
Remains the same from the top to the bottom of a group.
Electrons are added into the outermost:
In Groups 1 and 2 (Alkali metals and Alkaline earth metals).
Electrons are added in the outermost:
In Groups 3 through 12 (Transition metals).
Electrons are added in the outermost:
In Groups 13 through 18 (Boron group through Noble gases).
Hence, the trends in electron configuration in the periodic table are discussed above.
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Arrange the following elements from lowest to highest ionization energy: Be, Mg, Ca, Rb, Sr
a. Be, Mg, Ca, Rb, Sr
b. Rb, Sr, Ca, Be, Mg
c. Rb, Sr, Ca, Mg, Be
d. Be, Mg, Ca, Sr, Rb
Answer:
It's (C)
Explanation:
I did research trust me I seached up the ionization energy of all of them, Be, Mg, Ca, Rb, and Sr
Since ionization energy decreases down the group and and increases across the period, the order from lowest to highest ionization energy is; Rb, Sr, Ca, Mg, Be.
In the periodic table, certain trends vary across the period and down the group. Trends like ionization energy increase across the period but decreases down the group.
Looking at the elements mentioned, the correct arrangement in order of the lowest to highest ionization energy is; Rb, Sr, Ca, Mg, Be.
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PLEASE HELP FAST!!! Which is a characteristic of colloids?
Which one?
A. Are homogeneous mixtures
B. Have large dispersed particles
C. Will settle out over time
D. Are made up of at least two substances
Answer:
the answer is D. Are made up of at least two
Explanation:
took the test on edge
**help** .............
Answer:
from which chapter is this question
what example of matter is a mixture
Answer:
Most of the matter around us, however, consists of mixtures of pure substances. Air, wood, rocks and dirt are examples of such mixtures. Mixtures can be further classified as Homogeneous and Heterogeneous.
What is the mole ratio of the following equation?
2Mg + O2 + 2MgO
O 2:1:2
O 1:2
O 2:2:2
o 2:1
PLEASE HELPPPPP :(
Megan likes to take hot showers before she goes to bed. She makes sure that the temperature of the water is warm enough to create steam. When she gets out of the shower, she has to wipe the mirror because there is so much water on it. Which statement best describes why there is water on the mirror?
A. The steam collected on the mirror and got cooler, causing it to condense into water droplets.
B. The steam collected on the mirror and got warmer, causing it to condense into water droplets.
C. The steam collected on the mirror and then boiled, leaving behind water droplets.
D. The steam collected on the mirror and then evaporated, leaving behind water droplets.
Answer:
A
Explanation:
Which of Newton’s Laws is demonstrated by a larger truck requiring more force to accelerate than a smaller car?
Answer:
In your science class, you will learn about Newton’s laws of motion. Do you know why these laws are so important? When you throw a baseball or you bounce a basketball on the court, you can use Newton’s laws to explain the motion of the baseball or basketball. In fact, almost all motion in the world can be explained by these laws. Newton’s laws are useful when people design airplanes, trains, cars, sports equipment, toys, and many things that have to do with motion. Some people have trouble understanding Newton’s laws of motion because it’s hard to see how the laws work without any examples. One great way to understand these laws is to look at how they relate to cars in everyday life.
The First Law of Motion
“Every object persists in its state of rest or uniform motion in a straight line unless it is compelled to change that state by forces impressed upon it.”
Can you see why it’s hard for some people to understand the first law? Those are some complicated words. To help you to understand better, let’s break it down and use the example of a car. The first part deals with an object in a “state of rest”. This means that the object is not moving. When your mom or dad parks the car in the garage or the shopping mall, the car is said to be in a “state of rest” because it is not moving. The car will not move until the engine is started and somebody drives it away. The second part deals with an object in “uniform motion”. This means that the object is moving at the same speed. When you mom or dad is using “cruise control” on a highway at 60 miles per hour, the car will be moving at that speed in a “straight line” until something happens to change it. What is this change? It depends. By using the brakes, your mom or dad can slow the car down or bring it to a stop. On the other hand, the car’s direction will be changed if it is hit by another motor vehicle.Explanation:
what is the difference between a halogen and a halide?
need help urgently!
Answer:
In context|chemistry|lang=en terms the difference between halogen and halide. is that halogen is (chemistry) any element of group 7, ie fluorine, chlorine, bromine, iodine and astatine, which form a salt by direct union with a metal while halide is (chemistry) a salt of any halogen acid.
Explanation:
Answer:
When examining the periodic table, you will find that halogens are the electronegative elements in column 17, including fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). Halides are chemical compounds that contain halogens. ... Halides can be found in minerals, animals, and plants.
Hope this helps u... ^_^❤️6) Aluminum bromide decomposes
Answer:
The reaction begins and builds up heat. This heat causes the aluminum to melt and float on top of the liquid bromine (which is producing a cloud of vapor because the heat is also boiling it). Wherever the two elements meet, sparks, heat, and light are given off.
Explanation:
be more specific
what type of ions have names ending in ide?
A. only cations
B. only anions
C. only metal ions
D. only gaseous ions
What is the molarity of a solution in which 2.34g of NaCl is dissolved in 54.2mL of water?
A.
2.52M
B.
0.739M
C.
0.0432M
D.
43.2M
Answer:
answer - b 0.739
Explanation:
I hope answer correctplease follow and like meBased on atomicity , how molecules are categorized
Answer:
On the basis of atomicity, molecules can be classified as : Monoatomic-composed of 1 atom e.g. He, Ne, Ar (all noble gases are monoatomic) Diatomic-composed of 2 atoms e.g. H2 , N2 , O. Triatomic-composed of 3 atoms e.g. O
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SiS2 is a _____ compound
Answer:
SiS2, silicone disulfide, is a linear, nonpolar compound.
Which combination of principal energy level and sublevel
CANNOT exist?
Answer: 2d
Explanation:
Because you can not make a 2d
in the formation of silicon carbide represented by the chemical equation SiO2+3C-->SiC+2CO,8.0 mole of each reactant are available for the reaction. What substance is the limiting reactant?
The limiting reactant : C
Further explanationLimiting reactant : the smaller ratio from mol and their reaction coefficient
Reaction
SiO₂+3C⇒SiC+2CO
Reactants : SiO₂ and C
mol ratio
SiO₂ :[tex]\tt \dfrac{8}{1}=8[/tex]
C :[tex]\tt \dfrac{8}{3}[/tex]
[tex]\tt \dfrac{8}{3}<8\rightarrow C~as~limiting~reactant[/tex]
Hydrogen bonds can be found between molecules of which of the following
HF
C3H8
H2
CH4
Answer:
HF
Explanation:
Hydrogen bond is one of the chemical bonds that holds atoms and molecules together. Hydrogen bonding forms between an hydrogen atom and an electronegative atom such as fluorine, oxygen, or nitrogen. These electronegative atoms pull most of the electrons from the hydrogen atom, thereby, making the molecule a polar one.
An example of molecules that forms hydrogen bonding is Hydrogen fluoride (HF). The hydrogen atom of one HF molecule is attracted to the very electronegative fluorine atom of another HF molecule due to the difference in electrons. This forms the HYDROGEN BOND in HF molecule.
Please help me with this question
Answer:
Explanation:
Carbon C
4. Biowing a balloon is a physical and reversible change. When the balloon bursts, it is also a
physical change. Give more examples of physical change.
5. Torji blows air into a red balloon and then squeezes out the air from it. Explain why it is a
physical change.
guys plz help me
Answer: blowing a balloon is a physical change as when you blow a balloon the balloon expands but the balloon remains a balloon .there is change in Blowing a balloon is a physical change because only the size of the balloon changes , no change in chemical properties of the balloon occurs (no new substance is formed).
Explanation:
Arrange the elements in increasing order of reactivity : iron, gold, zinc, copper
Answer:
Iron, Copper, Zinc, and Gold
Explanation:
in Table of elements
Iron was no. 26
Copper no. 29
Zinc no. 30
Gold no. 79
How do you think dolphins find food in dark water, especially if
what they are looking for does not make any noise? What other
sense might they use to "see” without using their eyesight?
Answer: Dolphins use the sense (sound) to find food in dark water.
Explanation: Echolocation allows dolphins to “see" by interpreting the echoes of sound waves that bounce off of objects near them in the water. To echolocate objects nearby, dolphins produce high-frequency clicks. ... This information is critical for dolphins to find food and navigate in dark or murky waters.
Briefly outline an experiment that could be done to determine if flame color is dependent on temperature. What would you expect the results to show?
Answer:
Flame color is dependent on temperature.
Explanation:
Scientists have learned from various experiments which shows that red flames occurs when the temperature reaches to 980º up to 1,800º Fahrenheit. The colour of flames turn orange when the temperature reaches to 2,000º up to 2,200º Fahrenheit and when the temperature approaches 2,400º to 2,700º Fahrenheit, flames colour turns white.
A. What causes these H-bonds to form? (Hint: Look at the charged regions.)
Answer:
Hydrogen bonding is caused by the tendency of some atoms in molecules to attract electrons more than their accompanying atom. This gives the molecule a permanent dipole moment , it makes it polar, so it acts like a magnet and attracts the opposite end of other polar molecules.
Explanation:
the solubility of a gaseous solute _____ as the pressure on the solution ______
a. decreases, increases
b. increases, remains constant
c. increases, increases
d. increases, decreases
Answer:
B
Explanation:
Help meee :( if u help me i give u my love ):)
Answer:
1) carbon dioxide
Explanation:
2. 1.5 moles of AgNO3 reacts with 0.5 mole of Mg3P2. Calculate the moles of excess
reactant that remains at the end of the reaction. Include math to justify your answer.
Answer:
No of Moles in excess at the end of the reaction is 0.25 moles
Explanation:
AgNO3 + Mg3P2 → Ag3P + Mg(NO3)2
Balancing the equation we get
6AgNO3 + Mg3P2 → 2Ag3P + 3Mg(NO3)2
6 moles of AgNO3 needs 1 mole of Mg3P2
using unitary method
AgNO3 = [tex]\frac{1}{6}*Mg3P2[/tex]
1.5 AgNO3 = [tex]\frac{1}{6}*1.5[/tex]
= 1/4 = 0.25moles of Mg3P2
So 1.5 Moles of AgNO3 requires 0.25Mg3P2 for complete reaction but we have 0.5Moles of Mg3P2 available Therefore Mg3P2 is in excess
No of Moles in excess at the end of the reaction = 0.5 - 0.25 = 0.25moles
The temperature of 25.0 g of aluminum increases 10.0C when 222.5J of energy is added. What is the specific heat of aluminum?
Answer:
0.890J/gC
Explanation:
H=mcDeltaT --> c=H/mDeltaT
c= 222.5J/(25.0)(10.0)
222.5/250
0.890J/gC
Determine the bond type formed between Hg and F
a
Covalent
b
Simple Ionic
c
Multivalent Ionic
Answer:
Multivalent Ionic
Explanation:
The type of bond formed between the atoms of two elements can easily be deduced from the magnitude of electronegativity difference between the two bonding atoms.
A summary of electronegativity differences and corresponding types of bonds are shown below as adapted from chemlibretexts, where Δχ is the difference in electronegativity ;
ionic if Δχ ≥ 2.0
polar if 2.0 > Δχ > 0.5
nonpolar if 0.5 > Δχ
To determine the type of bond between Hg and F. Hg has an electronegativity of 2 while F has an electronegativity of 4. the difference in electronegativity (Δχ) is 4 - 2 = 2
This corresponds to a multivalent ionic bond because mercurous ion is the
Hg2^2+ ion and this leads to the formation of Hg2X2 (mercury I fluoride).
What parts of the eye are transparent and refract light? *
10 points
A. Retina and optic Nerve
B. Iris and pupil
C. Cornea and Lens
D. Lens and Optic Nerve
Answer:
Cornea
Lens
Retina
Explanation:
Brainliest?
in the cycle shown is mantle made of silicate rocks?why?
answer;
Yes,because the mantle under the crust is about 1800miles deep (2890km).It is composed mostly of SILICATE ROCKS in magnesium and iron.
or
Yes, because it is composed mostly of SILICATE ROCKS in magnesium and iron.
beginner hereee!
Answer: yes,because it is composed mostly of SILICATE ROCKS in magnesium and iron
Explanation:
The rocks that is present in Earth's mantle are mostly silicates due to the presence of high amount of silicon.
Silicates is a compound that is made up of a silicon and oxygen atoms. The mantle is made up of 44.8% oxygen, 21.5% silicon, and 22.8% magnesium by composition.
The most common compound that present is Silicon dioxide (SiO2) in the concentration of 48%, followed by Magnesium Oxide (MgO) at the concentration of 37.8%. Olivine, pyroxenes, spinel, and garnet are the types of rocks that is found in mantle.
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What are the five properties of matter?
Explanation:
Physical Properties
color (intensive)
density (intensive)
volume (extensive)
mass (extensive)
boiling point (intensive): the temperature at which a substance boils.
melting point (intensive): the temperature at which a substance melts.