8th Grade Science Review

____________ is anything that has mass and takes up space.

• matter
• compound
• particle
• subatomic

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4

All mater is composed of __________.

• compounds
• atoms
• water
• H2O

Tags

NGSS.MS-PS1-1

_____________ are the smallest unit of matter that retains the identity of the substance.

• compounds
• atoms
• water
• H2O

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

The nucleus of the atom has  the 
___________ and ___________ in it.

• protons and neutrons
• electrons and neutrons
• protons and electrons

Tags

NGSS.MS-PS1-1

A proton has a ___________ charge.

• positive
• negative
• neutral

Tags

NGSS.MS-PS1-1

An electron has a ___________ charge.

• positive
• negative
• neutral

The table shows the number of neutrons, protons, and electrons for two atoms. How are the two atoms alike?

• They have the same charge.

• They have the same mass number.

• They have the same atomic number

• They are atoms of the same element.

Tags

NGSS.MS-PS1-1

The diagram shows the arrangement of electrons in a neon atom. How many protons are present in this atom's nucleus?

• 10

• 8

• 2

• There is not enough information to answer this question.

Tags

NGSS.MS-PS1-1

Elements with seven valence electrons —

• are highly reactive

• are highly stable

• have a high mass

• have a low mass

Sulfur is a nonmetal. Of the following, the physical characteristic that is most

likely to describe a sample of sulfur is —

• a shiny appearance

• brittleness

• malleability

• ductility