Answer:
The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.
relative charge = -1
Relative mass = 1.1836
It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
He constructed the glass tube and create vacuum in it. He applied electric current between electrodes. He noticed that a ray of particles coming from cathode to wards positively charged anode. This ray was cathode ray.
Properties of cathode ray:
The ray is travel in straight line.
The cathode ray is independent of composition of cathode.
When electric field is applied cathode ray is deflected towards the positively charged plate.
Hence it was consist of negatively charged particles.
While neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.
Relative mass of proton= 1
Relative mass of neutron = 1
Relative mass of proton = +1
Relative charge of neutron = 0
The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons. The umber of protons and electrons are always equal to make the atom electrically neutral.
Explanation:
Many photographers take pictures of scenety. Below is a sample of a popular technique that they use. The technique captures a picture of the mountains and the sky in the water. Identify which property of light is being demonstrated in this technique.
A. interference
B. water colors
C. refraction
D. reflection
The property of light being demonstrated in the picture is reflection of light.
What is reflection?Reflection of light is defined as a property of light ray that when it strikes a smooth surface it bounces back .Objects can be seen due to this property of light.Reflection is produced by all types of waves namely sound waves, light waves, electromagnetic waves.
Reflection of light is governed by laws of reflection which are also called as Snell's laws. According to laws of reflection, angle of incidence and angle of reflection are equal.The incident ray , reflected ray and normal all lie on the same side of the plane.Light travels in a straight line before, after and during the process of reflection.There are 3 types of reflection which are diffuse reflection,specular reflection and glossy reflection.
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Calcium has a charge of +2. The chart lists the charges of different ions.
Which are possible equations for an ionic compound with calcium?
CaO, CaMg, or CaF2
Ca2Cl, CaNa, or CaP
CaF, CaMg, or CaNa
CaO, CaF2, or CaCl2
Answer:
I think it is
Ca2Cl, CaNa, or CaP
Explanation:
. What units would you use to measure a red blood cell?
1. Nanometers
2. micrometers
3. millimeters
Answer:
nanometers im guessing :<
Explanation:
If 12.4 mol of Ne gas occupies 122.8 L, how many mol of Ne would occupy 339.2 L under the same temperature and pressure? Record your answer in scientific notation using 3 significant figures.
Answer:
3.43×10¹ mol
Explanation:
Given data:
Initial number of moles = 12.4 mol
Initial volume = 122.8 L
Final number of moles = ?
Final volume = 339.2 L
Solution:
The number of moles and volume are directly proportional to each other at same temperature and pressure.
V₁/n₁ = V₂/n₂
122.8 L/ 12.4 mol = 339.2 L / n₂
n₂ = 339.2 L× 12.4 mol / 122.8 L
n₂ = 4206.08 L.mol /122.8 L
n₂ = 34.3mol
In scientific notation:
3.43×10¹ mol
PLEASE HELP ILL MARK BRAINLEST
Record your data either in your lab notebook or in the space below.
Table A. Predictions of Kinetic Energy and Resulting Beanbag Height for Varying Masses
Mass
(kg)
Velocity
(m/s)
Kinetic Energy
(kg∙m2/s2)
Height of Beanbag
(m)
Average Height of Beanbag
(m)
0.125
0.250
0.375
0.500
Observations
Answer:
Answer:
0.35
0.91
1.26
1.57
Explanation:
did it on edge
Answer:
Hey lol, not sure why my answer got deleted and why I got warned but regardless of the reason, the answer should be: 0.35, 0.91, 1.26, 1.57
Explanation:
I did it yesterday on e d g e n u i t y
With unbalanced forces, the object will move in the direction of the _____ force.
A) cannot be determined
B) larger
C) equal
D) smaller
Answer:
b: LARGER
Explanation:
im just different :)
Please help!
1.Ionic compounds are formed when.
-metal reacts with non metal
-metal reacts with metal
-when non-metal reacts with non-metal
2.True or false. Ionic bonds are electrostatic forces.
-True
-False
3.Sodium loses one electron when it reacts with.
-Magnesium
-potassium
-Chlorine
Compare and contrast how observations and results can be used to support a conclusion to an experiment.
Answer:
Difference between Observation and Results:While performing any ex
Explanation:
PLSS HELP ME! Read each statement below and decide if you agree or disagree. Write Agree or Disagree below each statement, based on your decision.
1. Temperature is the measurement of how hot or cold something is.
2. When something heats up, new energy is created, and when something cools down, energy is destroyed.
3.When something heats up, it moves faster, and when something cools down, it moves slower.
4. Hotter things have more energy than colder things.
Answer:
1. Temperature is the measurement of how hot or cold something is.
agree
2. When something heats up, new energy is created, and when something cools down, energy is destroyed.
disagree
3.When something heats up, it moves faster, and when something cools down, it moves slower.
agree
4. Hotter things have more energy than colder things.
agree
Greenhouse gases in the atmosphere trap
A.solar energy leaving Earth.
B.infrared energy leaving the sun.
C.solar energy near Earth's surfaces.
D.infrared radiation leaving Earth.
What is a half-life of an isotope? please help
Answer:
Explanation:
Hello! Hope this helps!
One important measure of the rate at which a radioactive substance decays is called half-life, or t1/2. Half-life is the amount of time needed for one half of a given quantity of a substance to decay. Half-lives as short as 10–6 second and as long as 109 years are common.
A student is pulling a large recycling bin. A teacher fills it with old papers to recycle. What property of the bin changes, and in what way? What does the student have to do to keep the bin moving at the same speed?
Answer:
the mass use his or her force to keep it at the same speed
Explanation:
Can someone help me like please
Answer:
the last one
Explanation:
one atom had a higher electronegativity than the atom it is sharing with.
Why does salad become soggy and wilted when the dressing has been on it for a while? Explain why, in terms of osmosis. PLS HELP FAST!
Please help like please
A candle burning is an example of _____. an exothermic change an endothermic change a physical change energy being taken in
Answer:
chemical change
Explanation:
it is turning into a different substance as it burns
ur welcome
Which type of front occurs when cold air and warm air are next to each other, but are at a standstill?
warm front
stationary front
cold front
occluded front
Which is it? grade 6 science class, pls help me, thank u, I'm sure I'm the lowest grade on Brainly so yeah this would be easy for you lol. l m a o!!!! ;) thx
A graph with horizontal axis time (seconds) and vertical axis position (meters). An orange line runs straight upward from 0 second zero meters. A concave blue line runs upward from the same point. Maia says that both lines on this position vs time graph show acceleration. Is she correct? Why or why not?
Answer:
Let's start by using the definition of acceleration. Acceleration is defined as the change in velocity over the change in time. In equation, that would be Δvelocity/Δtime. Based on the axes of the given graph, it shows the trend of position over time. So, the slope of the line and the curve shows the change of position over change of time, Δdistance/Δtime. In physics, this is the definition of speed or velocity. So, Maia is incorrect. Both curves show the speed or velocity of the object, and not acceleration. If the graph used a y-axis of velocity instead of position, then only at that instance, would be Maia be correct.
The difference between the two is, the straight line shows constant velocity while the curve line shows changing velocity.
Explanation:
Maria is incorrect because the line or curve shown in the graph gives value of velocity not of acceleration.
What is acceleration?Acceleration of any object is dfine as the rate of change in velocity with respect to the distance.
According to the question, graph is plotted between time and distance so slope of the graph gives the value of change in position with repect to the time and this is used to define velocity as:
v = dx/dt
So, maria is incorrect.
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Judging from the diagram, which of the following statements is true?
A. Sound travels at the same speed through both cold and warm air.
B. Sound travels faster through cold air than through warm air.
C. A sound wave's wavelength shortens when it travels from cold air into warm air.
D. Sound travels faster through warm air than through cold air.
Answer: D, sound travels through warm air faster than cold
Explanation:
Molecules move faster and transmit more sound vibrations in warm air.
the color of a mineral is powdered form
a. luster
b.streak
c.hardness
science i need help please
Answer: Streak
Explanation: The color of a mineral in powdered form is called the mineral's streak. To find a mineral's streak, the mineral is rubbed against a piece of unglazed porcelain called a streak plate. The mark left on the streak plate is the streak.
The streak of a mineral is its powder's color, because streak does not vary, it is a more dependable quality than color. Minerals of the same color may have a streak of a different hue, hence option B is correct.
The streak of a mineral refers to the color of the material when it is in powdered form. A streak plate is an unglazed piece of porcelain that is used to locate a mineral's streak. The streak is the mark that was left on the streak plate.
When minerals are powdered, they often take on a distinct hue than when they are in crystal or massive form. It might be a completely different tint or a completely different color.
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The table shows data collected on the growth rate of a fruit fly population.
What conclusion does the data support?
The population of fruit flies will continue to grow after 45 days pass.
The population of fruit flies reaches the carrying capacity at 35 days.
The death rate of fruit flies is greater than the birth rate of fruit flies at 40 days.
A disease enters the population at 35 days and prevents population growth.
Answer:
The population of fruit flies reaches the carrying capacity at 35 days.
Explanation:
hope this helped!
The table shows data collected on the growth rate of a fruit fly population of fruit flies reaches the carrying capacity at 35 days. Option B is correct.
What is a fruit fly?The scientific name of the fruit fly is Drosophila melanogaster and can also be known as the tiny pest which reproduces very quickly and in a large mass f population and is disease-causing.
The name is given to her fruit fly because it mainly damages or spoils the fresh fruits and vegetables that if cannot be washed properly before eating can cause a defect in human health and harm humans.
Therefore, Option B is correct, table shows data collected on the growth rate of a fruit fly population of fruit flies reaches the carrying capacity at 35 days.
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A leaf on a tree stars moving when the wind blows on it how is this an example of newton's first
A. the wind exerts a force on the leaf causing its motion to change
B the wind exerts no net force on the leaf because it is not a push or pulls
C. the leaf stops moving even though the wind continues to blow
PLEASE HELP ASAP
Is mass conserved when 40 g of sodium hydroxide undergoes a chemical change during an interaction with 36.5 g of hydrogen chloride? Use complete sentences to support your answer by explaining how this can be demonstrated.
Answer:
Explanation:According to the law of conservation of mass (mass remains the same throughout a reaction), mass is conserved in this case. This can be proven by comparing the weight of two enclosed glass containers of the reaction. They will most likely have the same weight because the products the chemical reaction creates would most likely produce a gas that can be trapped if there is no opening in the glass container. To further investigate, compare the weights of the products of the reaction with an enclosed container to another container with no lid of the same reaction.
Which statement describes how pioneer species and climax communities are different?
A. Pioneer species tend to have large body sizes, and climax communities contain species with only small body sizes
B. Pioneer species mark the end of succession, and climax communities mark the beginning
C. Primary species have many species types, and climax communities have few species
D. Primary species have large numbers of offspring, and climax communities contain species that have small numbers of offspring
PLEASE HURRY!!!!!!!!!!!!! God bless all! :)
Edited at 12:55 p.m.: I found the answer so if you still want points just put down whatever you want to. Nothing mean though. Thanks and God bless
Explanation:
thaks!!!!!!!!!!!!!!!#!
help pls match allll
The mass of the electron is..
A) about equal to the neutron
B) almost the same as the proton
C) very small compared to the proton
D) very large compared to the neutron
At STP a gas occupies a 26.4 kiloliter balloon. How many mol of the gas must be in the balloon? Answer as a whole number.
Hello!,I'm Lyo, and I'm a Brazilian teacher.
this gas is hydrogen.
Molar mass (M.M): stp = 22.71 Mol/liters
good studies for you!
Please help y’all I don’t understand
Answer:
2 electrons
Explanation:
If you look at the periodic table, you will see that oxygen is in group 16. If you subtract 10 from 16, you will get 6 electrons, which means oxygen has 6 valence electrons. In order to become stable, you need 8 electrons. So add 2.
Sulfuric acid is a colorless, oily liquid, used in the manufacturing of detergents, fertilizers, dyes and pigments, and even explosives. The chemical formula for sulfuric acid is H2SO4. Students were asked to make claims about how many total atoms are in this formula and support their claim with evidence. Choose the correct claim with the best supporting evidence. A. Ryan said there are 8 total atoms: two hydrogen (H) atoms, two sulfur atoms (S), and four oxygen (O) atoms. B .Camila said there are 7 total atoms: one hydrogen (H) atom, two sulfur atoms (S), and four oxygen (O) atoms. C. Parris said there are 7 total atoms: two hydrogen (H) atoms, one sulfur (S) atom, and four oxygen (O) atoms. D. Anthony said there are 10 total atoms: two hydrogen (H) atoms, four sulfur (S) atoms, and four oxygen (O) atoms.
Answer:
Sulfuric acid is the most widely used acid in industry. It is used to make detergents, dyes, drugs, explosives, pigments, fertilizers, and many other products. It is also the acid in lead-acid electric batteries. Chemical formula: H2SO4.
Explanation:
Please help y’all I don’t understand
Answer:
the last one
Explanation: