Unit Test

How do bonds tend to form between nonmetals?

• Atoms gain or lose electrons
• Atoms share electrons
• Atoms gain or lose neutrons
• None of the above

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

How do bonds tend to form between metals and nonmetals?

• Atoms gain or lose electrons
• Atoms share electrons
• Atoms gain or lose neutrons
• None of the above

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NGSS.HS-PS1-2

A student is studying calcium, a highly reactive element that humans need for strong bones. Which characteristics of calcium is most closely related to its chemical reactivity?

• The 20 protons in each atom of calcium

• The density of calcium

• The atomic number

• The two valence electrons in each atom of calcium

What part of the atom determines the chemical properties or reactivity?

• Protons

• Electrons

• Valence Electrons

• Energy levels

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element has a higher electronegativity value?

• Niobium

• Tin

• Cadmium

• Iodine

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NGSS.HS-PS1-1

What does electronegativity do as you go across a period?

• decrease

• no pattern

• stay the same

• increase

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

The table above shows the number of protons, atomic radius, and the electronegativity of several elements. Which of the following best helps explain the deviation of the electronegativity of krypton from the overall trend?

• The atomic radius of krypton is smaller than the atomic radius of bromine.

• The atomic radius of krypton is smaller than the atomic radius of bromine.

• There is repulsion between the electrons in krypton’s valence shell.

• The valence shell in krypton is full meaning it is unreactive.

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

As you move down the periodic table atoms get bigger.  This is because ____________.

• The atoms have more mass.
• The atoms have more protons.
• The atoms have more energy levels
• The atoms have more nuetrons

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NGSS.HS-PS1-1

Which of the following will have a larger radius than Zinc?

• Gallium
• Aluminum
• Magnesium
• Strontium

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NGSS.HS-PS1-1

Order the following in increasing atomic radii: 
Ra, Be, Ca, Rb, H

• Ra, Be, Rb, H, Ca
• Rb, H, Ca, Be, Ra
• Ra, Rb, Ca, Be, H
• H, Be, Ca, Rb, Ra

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NGSS.HS-PS1-1