Unit 2 Pre-assessment/Review

Subatomic particles found in the nucleus are _________.

• protons and neutrons

• electrons and neutrons

• protons and electrons

• electrons only

Total number of  ______ is equal to the atomic number of an element.

• protons
• protons and neutrons
• neutrons
• electrons

Tags

NGSS.MS-PS1-1

What charge does a proton have?

• positive
• negative
• no charge
• neutral

What charge does an electron have?

• positive
• negative
• neutral
• no charge

Tags

NGSS.MS-PS2-3

What charge does a neutron have?

• positive
• negative
• neutral (no charge)

The size of a neutron is about the same size as a(n) _______.

• electron
• proton
• atom

Where are valence electrons found?

• in the outermost energy level
• in the innermost energy level
• in the nucleus
• in the electron cloud

Tags

NGSS.HS-PS1-1

Where is the atomic number of an element found on the periodic table?

• at the top of an element's box

• at the bottom of an element's box

• not on the periodic table

• to the left of the row the element is in

Horizontal rows are called _____.

• periods
• groups
• families
• atomic numbers

Vertical columns are called _____.

• groups
• periods
• atomic numbers
• atomic columns