8th grade science STAAR review 1

What element is represented in this Bohr Model? 

• Carbon
• Hydrogen
• Aluminum
• Lithium

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NGSS.MS-PS1-1

Which is an electron?

• A
• B
• C

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NGSS.MS-PS1-1

What is the atomic number?

• The number of protons in an element
• The number of neutrons in an element
• The number of protons and neutrons.
• The number of protons and electrons.

What is found in the nucleus of atoms?

• Protons and electrons.
• Protons, neutrons, and electrons.
• Protons and neutrons.
• Neutrons and electrons.

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NGSS.MS-PS1-1

How many valence electrons does Sodium (Na) have?

• 1
• 2
• 3
• 4

Each row in the periodic table is called a 

• group
• period
• cluster
• unit

Each column in the periodic table is called a 

• period
• group
• cluster
• unit

Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)

• H₃SO₄
• HSO₄
• H₄S₃O
• H₂O

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NGSS.MS-PS1-1

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

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NGSS.MS-PS1-1

In the equation,          2Mg + O₂ ---> 2MgO, which are the reactants?

• Mg and O
• MgO
• Mg and MgO
• O and MgO

Tags

NGSS.MS-PS1-1