Atomic structure

Question 1

How published his idea about atoms?

Answer 1

John Dalton published his idea about atoms.

Question 2

What year did john Dalton share his idea about atoms?

Answer 2

In 1803

Question 3

What did John Dalton think about atom?

Answer 3

He thought that all matter was made by atom.

Question 4

When did Electrons got discovered?

Answer 4

Electrons got discovered nearly 100 year later.

Question 5

Who discovered Electrons?

Answer 5

J J Thomas discovered electrons.

Question 6

What is plum pudding model?

Answer 6

An early model of the atom in which an atom is a ball of positive charge with Negative electrons embedded.

Question 7

Who designed an experiment to test plum pudding model?

Answer 7

Ernest Ruther ford designed an experiment from plum pudding model.

Question 8

When Ernest Ruther ford test them?

Answer 8

Hi test in 1909.

Question 9

What did Ernest Ruther ford find in experiment

Answer 9

In the experiment hi find out there is an positively charged alpha particle were find in the gold fiol.

Question 10

What is Alpha particle?

Answer 10

Subatomic particle comprising two protons and two neutrons.

Question 11

What did new atom called?

Answer 11

It called a nuclear model.

Question 12

What is inside of nuclear?

Answer 12

The mass of an atom is concentrated at the centre of atom there is Nucleus, that contain protons and neutrons.

Question 13

What charge does protons have?

Answer 13

Protons have positive charge.

Question 14

What charge does neutron have?

Answer 14

Neutrons have no charge they are neutrol.

Question 15

What charge does electrons have?

Answer 15

Electrons have negative charge.

Question 16

What is atomic number?

Answer 16

The tell us how many number of protons in the nucleus of an atom. Also called the protons number.

Question 17

What is Mass number?

Answer 17

The mass number of an atom is its total number of protons and neutrons.

Question 18

What is subatomic particle?

Answer 18

Objects found in atoms, including protons, neutrons and electrons.

Question 19

How to calculate the number of subatomic particles?

Answer 19

To calculate the number of subatomic number in an atom, use its atomic number and the mass:
1.Number of protons = atomic number
2.Number of electrons = atomic number
3.Number of neutrons = mass number - atomic number.

Question 20

What is isotopes?

Answer 20

Atoms of the same elements with different numbers of neutrons are called isotopes.

Question 21

What does isotopes has?

Answer 21

Isotopes of an elements have:
1.The same atomic number.
2.Different mass numbers.

Question 22

What is relative atomic mass?

Answer 22

The mean relative mass of the atoms of the atoms of the different isotopes in an elements.

Question 23

Who to calculate relative atomic mass?

Answer 23

The relative atomic mass, Ar, of an elements is calculated from:
1.The mass numbers of its isotopes.
2.The abundance of these isotopes.

Question 24

What is abundance?

Answer 24

If there is a lot of something, it is described as being abundant.

Question 25

What formula to find relative atomic mass?

Answer 25

Ar total mass of atoms/totals number of atoms.