Three Subatomic particles

Q.

Name three fundamental particles of an atom. Give the symbol with charge, on each particle.

Q.

Do all atoms have the same number of electrons and protons?

Q.

Which one has larger atomic radius-F or Cl?

Q.

What is the absolute mass and charge of an electron?

Q.

Protons, Neutron, Electron can be further divided into what????

Q.

In cathode ray experiment why does only electron move to protons

Why not protons move to electron? Please tell me now because I have test tomorrow?

Q.

What is the fraction of the mass of water due to neutrons?

Q. What is the role of nucleus in an atom ?

Q. Which of the following are true for an element?
(i) Atomic number = number of protons + number of electrons
(ii) Mass number = number of protons + number of neutrons
(iii) Atomic mass = number of protons = number of neutrons
(iv) Atomic number = number of protons = number of electrons

1. (iii)
2. (i)
3. (iv)
4. (ii)

Q.

The neutral particle in an atom.

Q.

An atomic number is equivalent to the number of protons and neutrons in the atom.

1. True
2. False

Q.

What are the two structural parts of an atom ?

Q.

The smallest particle that can exist in free state is molecule.

1. True
2. False

Q.

Why are orbits also called as energy levels?

Q.

The number of electrons lost by Al atom to complete it's octet is equal to which elements atomic number?

1. Sodium

2. Magnesium

3. Beryllium

4. Lithium

Q.

Assertion: The mass number of Hydrogen is equal to its atomic number.

Reason: H-atom has no neutrons.

1. Assertion is correct but reason is incorrect.

2. The assertion is correct but the reason is incorrect.

3. Both assertion and reason are correct and the reason is the correct explanation for assertion.

4. Both assertion and reason are correct but reason is not the correct explanation for assertion

Q.

Which particles are lighter and free to move about?

1. Positrons

2. Electrons

3. Protons

4. Neutrons

Q. James Chadwick got Noble Prize for the discovery of____________.

1. protons
2. electrons
3. neutrons
4. mesons

Q.

What is atomic mass? How is amu expressed? [2 MARKS]

Q.

When an electron jumps from lower to higher orbit its energy

Q.

What is a mass defect?

Q.

Meaning of atomic number

Q.

Name three fundamental particles of an atom. Give the symbol with charge, on each particle.

Q.

The maximum number of electrons that can be accomodated in an orbit is given by the formula ________ where n is the number of orbit.

1. 2(n + 2)

2. 2/n²

3. 2n + 2

4. 2n²

Q. Then increasing order for the value of e/m for the electron, proton, neutron and $\alpha$ particle is:

1. $e,p,n,\alpha$
2. $n,p,e,\alpha$
3. $n,p,\alpha ,e$
4. $n,\alpha ,p,e$

Q.

Name of the fundamental particle whose relative charge is -1.

Q. If total number of electrons in an atom are 8 then set of quantum numbers will be.

Q.

What is meant by subatomic particle

Q.

How can we briefly describe atomic mass?

Q.

Alpha particles are charged.