Ch. 4 Introduction to Atoms

Question 1

the smallest unit of an element that maintains the properties of that element

Answer 1

atom

Question 2

a subatomic particle that has a negative charge

Answer 2

electron

Question 3

in physical science, an atom´s central region, which is made up of protons and nuetrons

Answer 3

nucleus

Question 4

a region around the nucleus of an where electrons are likeley to be found

Answer 4

electron cloud

Question 5

a subatomic particle that has a positive charge and is found in the nucleus

Answer 5

proton

Question 6

a unit of mass that describes the mass of an atom or molecule

Answer 6

atomic mass unit

Question 7

a subatomic particle that has a no charge and is found in the nucleus

Answer 7

nuetron

Question 8

the number of protons in the nucleus of an atom; the atomic number is the same for all atoms of an element

Answer 8

atomic number

Question 9

an atom that has the same number of protons as other atoms of the same element do but has a different number of nuetrons

Answer 9

isotope

Question 10

the sum of the numbers of protons and neutrons in the nucleus of an atom

Answer 10

mass number

Question 11

the mass of an atom expressed in atomic mass units

Answer 11

atomic mass