Category 4 STAAR Released 8th Science

an atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?

• 10
• 20
• 30

If the mass number of this chlorine atom is 36, how many neutrons does it have?

• 17

• 18

• 19

• can't be determined

Tags

NGSS.MS-PS1-1

What is the mass number of the atom shown in the Bohr model?

• 11

• 12

• 23

• Can't be determined

Tags

NGSS.MS-PS1-1

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

The horizontal (side to side) rows in the Periodic Table are called

• groups

• families

• periods

• atomic numbers

what group number are the noble gases

• 17

• 18

• 14

• 15

The substances listed on the right side of a chemical equation are the

• Yields
• Reactants
• Products
• Precipitates

Tags

NGSS.MS-PS1-5

How many Oxygen (O) atoms are in 2C₂HO₈C_l2

• 2
• 16
• 8
• 5

Tags

NGSS.MS-PS1-1