Ions - Regents Chemistry

What is the number of electrons in a potassium atom?

• 18

• 19

• 20

• 39

Tags

NGSS.HS-PS1-1

What is the number of electrons in an atom that has 20 protons and 17 neutrons?

• 3

• 17

• 20

• 37

Tags

NGSS.HS-PS1-1

Which statement describes the charge of an electron and the charge of a proton?

• An electron and a proton both have a charge of +1.

• An electron and a proton both have a charge of -1.

• An electron has a charge of +1, and a proton has a charge of -1.

• An electron has a charge of -1, and a proton has a charge of +1.

Tags

NGSS.HS-PS2-4

Compared to the charge of a proton, the charge of an electron has

• the same magnitude and the same sign

• the same magnitude and the opposite sign

• a greater magnitude and the opposite sign

• a greater magnitude and the same sign

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

If an atom loses electrons when forming an ion, the charge will be:

• positive
• negative
• neutral

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

If an atom gains electrons when forming an ion, the charge will be:

• positive
• negative
• neutral

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How does a Rb atom form a Rb¹⁺ ion?

• A rubidium atom loses an electron.

• A rubidium atom gains an electron.

• A rubidium atom loses a proton.

• A rubidium atom gains a proton.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How does a Br atom form a Br^1- ion?

• A bromine atom loses an electron.

• A bromine atom gains an electron.

• A bromine atom loses a proton.

• A bromine atom gains a proton.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the overall net charge of an ion that has 12 protons, 10 electrons and 14 neutrons?

• 2+

• 2-

• 4-

• 4+

An ion that consists of 7 protons, 6 neutrons and 10 electrons has a net charge of

• 4+

• 3+

• 3-

• 4-

Tags

NGSS.MS-PS1-1