1.Suppose an atom of an element has 4 protons. Which statement about this atom MUST be true?
a.Four neutrons orbit around the nucleus of 4 protons.
b.The nucleus has a positive charge of 4.
c.The atom contains 4 electrons in its nucleus.
d.Four protons orbit around a nucleus of 4 electrons.
2.How do two hydrogen atoms form a chemical bond?
a.Electrons are shared so the shell of each atom is filled.
b.The proton of one atom is attracted to the electron of the other atom.
c.Neutrons orbit between both atoms.
d.Nuclei of both atoms fuse together so that the number of electrons reaches a stable number.
3.What is the arrangement of chemical bonds in the molecule carbon dioxide (CO2)?
a.Carbon forms an ionic bond with each oxygen atom.
b.Carbon forms a covalent bond with each oxygen atom.
c.Carbon forms two covalent bonds with each oxygen atom.
d.Carbon gives up its electrons to a molecule of oxygen.
a.Four neutrons orbit around the nucleus of 4 protons.
b.The nucleus has a positive charge of 4.
c.The atom contains 4 electrons in its nucleus.
d.Four protons orbit around a nucleus of 4 electrons.
2.How do two hydrogen atoms form a chemical bond?
a.Electrons are shared so the shell of each atom is filled.
b.The proton of one atom is attracted to the electron of the other atom.
c.Neutrons orbit between both atoms.
d.Nuclei of both atoms fuse together so that the number of electrons reaches a stable number.
3.What is the arrangement of chemical bonds in the molecule carbon dioxide (CO2)?
a.Carbon forms an ionic bond with each oxygen atom.
b.Carbon forms a covalent bond with each oxygen atom.
c.Carbon forms two covalent bonds with each oxygen atom.
d.Carbon gives up its electrons to a molecule of oxygen.