basic chemistry

Question 1

anything that has mass and occupies space

Answer 1

matter

Question 2

smallest particle of an element that has the characteristics of the element

Answer 2

atom

Question 3

found in the center of atom

Answer 3

nucleus

Question 4

the nucleus contains

Answer 4

protons (+ charge) and neutrons (no charge)

Question 5

protons and neutrons are located in the _______ and the electrons are located in the _______.

Answer 5

nucleus; energy shell

Question 6

electrons (- charge) spin _______ the _______ and are found in the ________ ________.

Answer 6

around; nucleus; electron cloud

Question 7

electrons are arranged in ….

Answer 7

shells in the electron cloud.

Question 8

substance that can’t be broken down chemically to form simpler kinds of matter

Answer 8

element

Question 9

what is the number on the top right corner of an element box mean?

Answer 9

atomic number

Question 10

what does the numbers on the bottom of an element box mean?

Answer 10

atomic mass

Question 11

number of protons in an atom of an element

Answer 11

atomic number

Question 12

number of protons and neutrons added together

Answer 12

atomic mass

Question 13

To find the number of neutrons, you must:

Answer 13

subtract atomic number from atomic mass

Question 14

atoms of the same element that have different numbers of neutrons

Answer 14

isotope

Question 15

when atoms of two or more elements combine in fixed proportions

Answer 15

compounds

Question 16

the way a chemical substance looks and behaves

Answer 16

properties

Question 17

a substance made of two or more atoms

Answer 17

molecules

Question 18

usually do not contain carbon; generally come from Earth; generally simple molecules

Answer 18

inorganic compounds

Question 19

always contain C & H and usually O, N, sometimes S & P; originate in organisms; generally complex molecules

Answer 19

organic compounds

Question 20

an atom or group of atoms that have lost or gained one or more electrons

Answer 20

ion

Question 21

ions with opposite charges (- or +) are attracted to each other and form ___________.

Answer 21

an ionic bond

Question 22

in _______ reactions, atoms share electrons, resulting in __________ bonds.

Answer 22

covalent

Question 24

special type of dipole-dipole attraction between molecules, not a covalent bond to a hydrogen atom

Answer 24

hydrogen bonding