chapter 11

Question 1

a small partial that is the building block of matter

Answer 1

atom

Question 2

anything that has mass and takes up space

Answer 2

matter

Question 3

matter with a composition that is always the same

Answer 3

substance

Question 4

a substance that consist of only one type of an atom

Answer 4

element

Question 5

two or more atom that are held together by a covalent bond and act as a unit

Answer 5

molecule

Question 6

a substance containing atoms of two or more elements chemically bonded together

Answer 6

compound

Question 7

matter that can very in composition

Answer 7

mixture

Question 8

a mixture in which substances are not evenly mixed

Answer 8

heterogeneous mixture

Question 9

a mixture in which two or more substances are evenly mixed but not bonded together

Answer 9

homogeneous mixture

Question 10

the region in the center of an atom where most of the atoms mass and positive charge is concentrated

Answer 10

nucleus

Question 11

a positively charged particle in the nucleus of an atom

Answer 11

proton

Question 12

a neutral partical in the nucleus of an atom

Answer 12

neutron

Question 13

a negatively charged partical that occupies the space in an atom outside the nucleus

Answer 13

electron

Question 14

the region surrounding an atoms nucleus where one or more electrons are most likely to be found

Answer 14

electron cloud

Question 15

the number of protons in an atom of an element

Answer 15

atomic number

Question 15

atoms of the same element that have different numbers of neutrons

Answer 15

isotope

Question 16

an atom that is no longer neutral because it has gained or lost electrons

Answer 16

ion