PS 6.1 Formative

An atom forms an ion by gaining or losing _____.

• protons

• neutrons

• electrons

• anions

An ion with a negative charge is a(n) _____.

• anion

• cation

• valence

• dot diagram

An ion with a positive charge is a(n) _____.

• anion

• cation

• valence

• dot diagram

A _____ is the force that holds atoms or ions together as a unit.

Tags

NGSS.HS-PS1-4

An _____ bond is formed when electrons are transferred from one atom to another.

The amount of energy used to remove an electron from at atom is called _____ energy.

• valence

• atomic

• chemical

• ionization

Ionization energy generally _____ from left to right across a period.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many electrons does a Ca²⁺ atom have?

• 2

• 22

• 20

• 18

Tags

NGSS.MS-PS1-1

How many valence electrons does a Cl^- ion have?

• 17

• 18

• 7

• 8

Tags

NGSS.HS-PS1-1

When the highest energy level of an atom is filled with electrons, the atom is stable, and not likely to _____.