Ions

What is the charge of an atom that has gained one electron?

• -1
• -2
• +1
• +2

What is the charge of an atom that has lost one electron?

• -1
• -2
• +1
• +2

Tags

NGSS.HS-PS1-1

How many total electrons does O^-2 (an oxide ion) have?

• 8
• 10
• 6
• 18

Tags

NGSS.HS-PS1-1

How many total electrons does Mg⁺² (a magnesium ion) have?

• 10
• 12
• 14
• 22

Tags

NGSS.HS-PS1-1

How many total electrons does Na⁺¹ (a sodium ion) have?

• 10
• 11
• 12
• 22

Tags

NGSS.HS-PS1-1

Cations are

• positive
• negative
• on the right side of the periodic table.
• nonmetals

Tags

NGSS.HS-PS1-1

How many electrons are in a Li⁺ ion?

• 1
• 2
• 3
• 4

Tags

NGSS.HS-PS1-1

How many electrons are in an S^2- ion?

• 10
• 14
• 16
• 18

Tags

NGSS.HS-PS1-1

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

• A bromine atom loses an electron.
• A bromine atom gains and electron.
• A bromine atom loses a proton.
• A bromine atom gains a proton.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which is the correct symbol for the element with 8 protons and 10 electrons?

• N^3-
• O^2-
• O^3-
• F^-

Tags

NGSS.HS-PS1-1