Atoms, Isotopes, and Ions

Multiple Choice

Which of the following statements best describes the role of neutrons in an atom?

• They are positively charged particles in the nucleus.

• They are negatively charged particles orbiting the nucleus.

• They are neutral particles in the nucleus.

• They are responsible for the chemical properties of the atom.

Dropdown

Moving around the space outside the nucleus are ​

Select answer

charged particles called ​

Select answer

. A ​

Select answer

atom has the same number of electrons as it has protons. 

Fill in the Blanks

Isotopes of an element have the same number of

but different numbers of neutrons.

Drag and Drop

Na-23 has ​

Placeholder

neutrons

Drag these tiles and drop them in the correct blank above

11

10

9

8

12

13

14

15

16

22

Match

Match the following

• number of protons & electrons

• number of neutrons

• mass number

18

22

40

• 18

• 22

• 40

Hotspot

Which isotope has 4 neutrons?

Match

Match the following

• isotope

• proton

• atomic mass

• electrons

• neutrons

element with different neutron numbers

determines the element identity

sum of protons and neutrons

negative charge found in the cloud

neutral charge, # makes isotopes

• element with different neutron numbers

• determines the element identity

• sum of protons and neutrons

• negative charge found in the cloud

• neutral charge, # makes isotopes