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 ​

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. A ​

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

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