chem chp 3

Question 1

Define atom

Answer 1

An atom is the smallest particle that can still have the chemical characteristics of an element

Question 2

What are the subatomic particles that make up an atom?

Answer 2

protons, electrons and neutrons

Question 2

What are protons and neutrons collectively known as?

Answer 2

Nucleons

Question 3

Where in the atom are protons and neutrons found?

Answer 3

In the nucleus

Question 4

Where in the atom are electrons found?

Answer 4

electron shells

Question 5

What is the relative mass of an electron?

Answer 5

1/1840

Question 6

What is another name for proton number?

Answer 6

atomic number

Question 7

What is another name for nucleon number?

Answer 7

mass number

Question 8

What is the nucleon number?

Answer 8

no. of protons + neutrons

Question 9

Define isotopes

Answer 9

atoms of the same element that have the same number of protons but different number of neutrons

Question 10

Define an ion

Answer 10

The particle formed when an atom or a group of atoms gain or lose electrons but the number of protons and neutrons remain the same