Staar Practice

A horizontal row of elements in the periodic table

• Molecule

• Period

• Family

• Atom

What is one way Neutrons are different from electrons?

• they both are negative

• neutrons have no charge, while electrons have a negative charge

• Both are in the nucleus( center of atom)

• Electrons are inside nucleus and neutrons are outside the nucleus.

Tags

NGSS.MS-PS1-1

What is the atomic number?

• 35

• 18

• 17

• 52

How many neutrons does Chlorine have?

• 18

• 17

• 35

• 52

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

Tags

NGSS.MS-PS1-1

How many Magnesium are in 10MgCl₂?

• 10
• 5
• 20

Tags

NGSS.MS-PS1-1

2H₂ + O₂ ----> 2H₂O What is the product?

• ------>
• 2H₂O
• 2H₂+ O₂

Tags

NGSS.MS-PS1-5

2H₂ + O₂ --------> 2H₂O What  are the reactants?

• ----->
• 2H₂O
• 2H₂ +O₂

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

How many O's are in Al₂(SO₄)₃

• 4
• 12
• 7
• 24

Tags

NGSS.MS-PS1-1

Number of H in 3(NH₄)₂CrO₄

• 4
• 2
• 8
• 24

Tags

NGSS.MS-PS1-1