2.1 The Structure Of Atoms

Question 1

Where is most of the mass of an atom concentrated?

Answer 1

Nucleus - protons and neutrons.

Question 2

What is the majority of the volume of an atom due to?

Answer 2

The electrons - nucleus small compared to total size of atom.

Question 3

What is the relative mass and charge of a proton?

Answer 3

Mass: 1
Charge: +1

Question 4

What is the relative mass and charge of a electron?

Answer 4

Mass: 5x10^-4
Charge: -1

Question 5

What is the relative mass and charge of a neutron?

Answer 5

Mass: 1
Charge: 0

Question 6

What are nucleons?

Answer 6

Protons and neutrons - particle in nucleus of atom

Question 7

What is the atomic number?

Answer 7

Number of protons in nucleus of an atom.

Question 8

What is the mass number?

Answer 8

Number of protons and neutrons in nucleus of an atom.

Question 9

How many protons are in the nucleus?

Answer 9

Ame as number of electrons since atom is neutral.

Question 10

How many neutrons are in the nucleus?

Answer 10

Mass number - atomic number.

Question 11

What is a positive ion?

Answer 11

Charged particle formed when atom loses electrons, fewer electrons than protons.

Question 12

What is a negative ion?

Answer 12

Charged particle formed when atom gains electrons, more electrons than protons.