Anions and Cations

An ion is

• Also a compound

• An atom that has gained or lost an electron

• An atom that has only gained electrons

• An atom where the number of protons=electrons

Cations

• Gain electrons, has an overall positive charge

• Lose electrons, has an overall positive charge

• Lose electrons, has an overall negative charge

• Gain electrons, has an overall negative charge

Anions

• Gain electrons, has an overall positive charge

• Lose electrons, has an overall positive charge

• Lose electrons, has an overall negative charge

• Gain electrons, has an overall negative charge

Which of the following is an anion?

• Lithium

• Magnesium

• Iodide

• Silver

Which of the following ions is an anion?

Tags

DOK Level 3: Strategic Thinking

An ion is a ____.

• charged particle

• charged molecule

• nonpolar particle

• nonpolar molecule

Tags

NGSS.MS-PS2-5

What is a positive ion called?

(a)  

• anion

• cation

• isotope

• covalent

An ion has 20 protons, 18 electrons, and 20 neutrons. Identify the ion and its charge.

Tags

DOK Level 3: Strategic Thinking

An ion has 19 protons, 18 electrons, and 20 neutrons. Identify the ion and its charge.

Tags

DOK Level 3: Strategic Thinking

A positive ion is called a...

• Posion

• Anion

• Cation

• Proton