science vocab chapter 9

Question 1

Chemical bond

Answer 1

a force that holds two or more atoms together

Question 2

valence electrons

Answer 2

outermost electron of an atom that aprticipates in chemical bonding

Question 3

electron dot diagram

Answer 3

model that represents valence electrons in an atom as dots around the elements chemical symbol

Question 4

covalent bond

Answer 4

chemical bond formed when two atoms share one or more pairs of valence electrons

Question 5

molecule

Answer 5

group of atoms held together by covalent bonding that acts as an indapendent unit

Question 6

polar molecule

Answer 6

a molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons

Question 7

chemical formula

Answer 7

group of chemical symbols and numbers that represent the elements and the numbers of atoms of each element that make a compound

Question 8

ionic bond

Answer 8

attraction between positively and negatively charged ions in an ionic compound

Question 9

metalic bond

Answer 9

when many metal atoms share there pulled valence electrons