Atomic Structure- Atomic Structure

Question 1

Neutrons are _______ (relative charge is _) and have a relative mass of _.

Answer 1

Neutrons are neutral (relative charge is 0) and have a relative mass of 1.

Question 2

Protons and neutrons are found in the _______ and _______ _____ the nucleus.

Answer 2

Protons and neutrons are found in the nucleus and electrons orbit the nucleus.

Question 3

Atoms have no overall charge because the number of positive _______ is equal to the number of negative _________.

Answer 3

Atoms have no overall charge because the number of positive protons is equal to the number of negative electrons.

Question 4

The _______ number is the number of protons.

Answer 4

The atomic number is the number of protons.

Question 5

The mass number is the number of _______ and _________ in total.

Answer 5

The mass number is the number of protons and neutrons in total.

Question 6

Atoms of the same element can have different numbers of neutrons; these atoms are called ________.

Answer 6

Atoms of the same element can have different numbers of neutrons; these atoms are called isotopes.

Question 7

Electrons are arranged in ______ levels (shells). The lowest shell can hold a maximum of _ electrons, the second can hold _ and the third can hold _.

Answer 7

Electrons are arranged in energy levels (shells). The lowest energy level (shell) can hold a maximum of 2 electrons, the second can hold 8 and the third can hold 8.

Question 8

Electrons occupy the ______ available energy level.

Answer 8

Electrons occupy the lowest available energy level.

Question 9

The electronic structure can be shown as a _______ or as _______. Eg for sodium that has 11 electrons, the electronic structure is __,__,__

Answer 9

The electronic structure can be shown as a diagram or as numbers. Eg for sodium that has 11 electrons, the electronic structure is 2,8,1

Question 10

Protons are _______ (relative charge is _1) and have a relative mass of _

Answer 10

Protons are positive (relative charge is +1) and have a relative mass of 1

Question 11

What are the 3 subatomic particles?

Answer 11

Protons, electrons, neutrons

Question 12

Electrons are ________ (relative charge is __) and their relative mass is ____ _____.

Answer 12

Electrons are negative (relative charge is -1) and their relative mass is very small.