Meridith Middle and Chemistry

Two atoms each contain 6 protons, but one has 6 neutrons and the other has 8 neutrons. What are these atoms called?

• binaries

• isotopes

• ions

• radicals

If an atom does not undergo radioactive decay, the number of protons within it will never change. This is why the number of protons is used to determine the

• number of covalent bonds an atom can form.

• amount of energy needed to split an atom

• reactivity of an atom.

• element of an atom.

Which of the following statements is true?

• Most nonmetals can be drawn into a wire, while metals would break apart.

• Most metals can be drawn into a wire, while nonmetals would break apart.

• Most metals and nonmetals conduct heat well, but nonmetals cannot conduct electricity

• Most metals and nonmetals conduct electricity well, but metals cannot conduct heat.

Which two elements have the most similar chemical properties?

• Cl and Ar

• Be and Mg

• Na and P

• Ca and Br

Tags

NGSS.HS-PS1-1

Which group of the Periodic Table contains atoms with a stable outer electron configuration?

• 1

• 8

• 16

• 18

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NGSS.HS-PS1-1

Why does the compound sodium fluoride contain an ionic bond?

• The fluorine transfers one electron to the sodium to fulfill the octet rule.

• The sodium transfers one electron to the fluorine to fulfill the octet rule

• The fluorine must share an electron with the sodium in order to fulfill the octet rule.

• The sodium must share an electron with the fluorine in order to fulfill the octet rule.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What do magnesium and chlorine react to form?

• MgCl2

• Mg2 Cl

• MgCl

• Mg2Cl2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the formula for the compound formed when a potassium ion (K+ ) and a sulfide ion (S2-) unite?

• KS

• K2S

• K3S

• KS2

What is the formula for the compound formed by a magnesium cation (Mg2+) and a fluoride anion (F- )?

• MgF

• MgF2

• Mg2F

• Mg2F3

What is the chemical formula for the stable ionic compound formed between cesium and oxygen?

• CsO

• Cs2O

• Cs3O

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2