Chemical Bonds

What is the difference between elements and compounds?

• they are the same

• elements make up compounds

• compounds make up elements

• compounds are made of the same type of atoms while elements are mad up of two or more types of atoms

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NGSS.MS-PS1-1

If an atom gains an electron, what charge will it have?

• positive

• negative

• neutral

Where is most of the mass of an atom found?

• nucleus

• electron cloud

• atomic number

• mass number

What are valence electrons?

• electrons that are in the electron cloud

• all the electrons in an atom

• electrons in outer shell of an atom

Tags

NGSS.MS-PS1-1

How many total electrons can the 2nd shell or energy level hold?

• 1

• 2

• 8

• 18

Tags

NGSS.MS-PS1-1

What happens to the valence electrons of an atom when it is a covalent bond?

• transfers electrons

• shares electrons

• does nothing

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NGSS.MS-PS1-1

What happens to the valence electrons of an atom that uses an ionic bond?

• transfers electrons

• shares electrons

• nothing

Which of the following is an ion?

• Na

• C

• O

• Na⁺¹

On the periodic table, carbon is in group 14, period 2. How many valence electrons does carbon have?

• 6

• 14

• 2

• 4

Tags

NGSS.MS-PS1-1

Which ion will nitrogen become when it goes through an ionic bond? It is in group 15.

• +5

• +3

• -5

• -3