Science Lessons

Presentation

•

Science

•

8th Grade

•

Hard

Joseph Anderson

FREE Resource

3 Slides • 4 Questions

Category 1 Review (8.5B)

Protons & Valence electrons

A = P = E

Atomic # = # protons = # electrons

*Positive charge

*Mass equivalent to 1 AMU (atomic mass unit)

Multiple Choice

Why are protons so important?

because they are in the nucleus

because they are positive

because they determine the identity of the element

Multiple Choice

Up to how many electrons can the 1st, 2nd and 3rd shell hold?

2:8:8

8:8:2

8:2:8

Multiple Choice

What is a valence electron?

is a regular electron

is an electron found on the outermost shell that bonds with other atoms

is a super subatomic particle

is a dense subatomic particle that helps determine the atoms charge

Multiple Select

What do valence electrons help us determine?

mass of an element

chemical properties

reactivity

charge

Category 1 Review (8.5B)

Protons & Valence electrons

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