Physical Science Exam Review

Which subatomic particle has the least mass?

• electron

• nucleus

• neutron

• proton

The best word to describe how electrons relate to two nuclei in a covalent bond is

• charged

• removed

• shared

• transferred

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NGSS.HS-PS1-1

What is the identity of the atom shown?

• argon

• bromine

• chlorine

• nitrogen

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NGSS.MS-PS1-1

The diagram shown is an example of the element

• boron

• bromine

• nitrogen

• sodium

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NGSS.MS-PS1-1

U-232

U-235

U-236

U-238

These nuclei all have a different number of

• electrons

• neutrons

• nuclei

• protons

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NGSS.HS-PS1-8

Which of the elements shown has an atomic mass of 20 amu?

• A

• B

• C

• D

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NGSS.MS-PS1-1

Which of the atoms seen here has the correct electron arrangement for a helium atom?

• 
• 
• 
• 

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NGSS.MS-PS1-1

Which statement is true about the element shown here?

• This element tends to gain electrons to become stable.

• This element needs to gain two electron to become stable

• This element tends to lose 2 electrons to become a 2+ ion.

• This element tends to form covalent bonds with other nonmetals.

Describe how the atoms carbon and hydrogen are more stable as a result of the formation of this covalently bonded compound.

• The carbon and hydrogen atoms lose electrons reducing their outer energy levels.

• The carbon and hydrogen atoms transfer electrons increasing their outer energy levels.

• The carbon and hydrogen atoms share electrons to complete their outer energy levels.

• The carbon and hydrogen atoms donate electrons completely filling their outer energy levels.

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NGSS.MS-PS1-1

The illustration depicts the formation of an ionic chemical bond between sodium and chlorine atoms. The result of this bonding is a chemical compound that is stable because the

• transferred electron provides chlorine with a full outer energy level.

• shared electron provides both elements with a full outer energy level.

• shared electron provides provides sodium with a full outer energy level.

• transferred electron provides both elements with a full outer energy level.

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NGSS.MS-PS1-1

NGSS.MS-PS1-2