SNC2D chemistry review

Which of the following is true?

• Most molecular compounds are composed of a metal and one or more non-metals

• Most ionic compounds are composed of 2 or more metals

• Most molecular compounds are composed of 2 or more non-metals

• Most ionic compounds are composed of 2 or more non-metals

• Most molecular compounds are composed of a metal and 2 or more metalloids

An atom that as atomic number = 5 and a mass number of 11...

• 5 protons,

  5 neutrons, 5 electrons

• 11 protons, 5 neutrons, and 11 electrons

• 5 protons, 11 neutrons, and 5 electrons

• 6 protons, 5 neutrons, 6 electrons

• 5 protons, 6 neutrons and 5 electrons.

A positive ion is called ___

• valence electron

• ionic compound

• anion

• cation

• stable

An negative ion is called ___

• valence electron

• ionic compound

• anion

• cation

• stable

Which one is correct?

• S^2-: a sulfur atom loses 2 electrons

• I^-: an iodide ion loses 1 electron

• Ca²⁺: a calcium atom loses 2 electrons

• N^3-: a nitrogen atom loses 3 electrons

• Na⁺: a sodium ion loses 1 electron

Which is NOT an ionic compound?

• NaCl

• MgCl₂

• CaCO₃

• CoBr₃

• CO

Which of metal is not a polyatomic?

• Mn

• Ag

• Hg

• Fe

• Cu

What is the name of this compound PbSe?

• lead II selenide

• lead IV selenide

• lead selenide

• lead II selenate

• lead selenium

Which one is sufite?

• SO₄^2-

• SO₃

• S^2-

• SO₃^2-

• SO₂^2-

Which one is the correct formula for ammonium sulfide?

• NH₄SO₃

• (NH₄)₂S

• (NH₄)₂SO₃

• (NH₄)₂SO₄

• NH₄S