Chemistry of life

Question 1

Nucleus (define)

Answer 1

center of the atom

Question 2

elements

Answer 2

pure substance that consists entirely of one type of atom

Question 3

compound

Answer 3

the chemical combination of two or more elements

Question 4

atom

Answer 4

basic unit of matter

Question 5

molecule

Answer 5

smallest unit of most compounds

Question 6

electron

Answer 6

negatively charged particle

Question 7

adhesion

Answer 7

attraction between molecules of different substances

Question 8

ionic bond

Answer 8

one or more electrons are TRANSFERRED

Question 9

covalent bond

Answer 9

when one or more electrons are SHARED

Question 10

isotopes

Answer 10

atoms - same element, different neutron quantity

Question 11

ions

Answer 11

positively and negatively charged atoms

Question 12

what is the difference between ionic and covalent bonds?

Answer 12

Ionic - electrons transferred, covalent - electrons shared

Question 13

What makes up an atom?

Answer 13

protons, neutrons, electrons

Question 14

what makes up nucleus

Answer 14

protons and neutrons

Question 15

What is between the nucleus and electrons in an atom?

Answer 15

empty space

Question 16

what is the density of a typical nucleus?

Answer 16

6.2 billion cars in a one cubic foot box

Question 17

Are protons positive, negative, or neutral?

Answer 17

positive

Question 18

are electrons positive, negative, or neutral?

Answer 18

negative

Question 19

are neutrons positive, negative, or neutral

Answer 19

neutral