4.1-4.3 skim reading

Question 1

what element must be present for combustion (burning) to occur

Answer 1

oxygen

Question 2

hydrogen and oxygen mixture ratio

Answer 2

mixture can have any ratio of hydrogen to oxygen

Question 3

chemical bond

Answer 3

force that hods atoms together in a compound

Question 4

why do chemical bonds form

Answer 4

because they lower the potential energy of the charged particles that compose atoms

Question 5

ionic bond

Answer 5

bond that forms between a metal and nonmetal

Question 6

covalent bond

Answer 6

bond that forms between two or more nonmetals

Question 7

molecular compounds

Answer 7

covalently bonded atoms form molecules

Question 8

chemical formula

Answer 8

indicates elemnts present in the compound and the relative number of atoms or ions of each

Question 9

empirical formula

Answer 9

indicates relative number of atoms of each element in a compound

Question 10

molecular formula

Answer 10

indicates the actual number of atoms of each element in a molecule of a compound

Question 11

structural formula

Answer 11

uses lines to represent covalent bonds and shows how atoms in a molecule are connected or bonded to each other