CHEMICAL BASIS OF LIFE

Question 1

all living and non living things are composed of

Answer 1

matter

Question 2

anything that occupies space and has mass

Answer 2

Matter

Question 3

amount of matter in an object

Answer 3

Mass

Question 4

the gravitational force acting on an object of a given mass

Answer 4

Weight

Question 5

simplest type of matter having unique chemical properties

Answer 5

Element

Question 6

smallest particle of an element

Answer 6

atom

Question 7

the ability of the atoms nucleus to pull electron towards it

Answer 7

electronegativity

Question 8

number of protons

Answer 8

atomic number

Question 9

the sum of the protons and neutrons in the nucleus

Answer 9

mass number

Question 10

has no electrical charge

Answer 10

neutron

Question 11

has one positive charge

Answer 11

proton

Question 12

one negative charge

Answer 12

electron

Question 13

protons and neutrons are found in the center of the

Answer 13

nucleus

Question 14

two or more forms of the same element that have the same number of protons and electrons but different numbers of neutron

Answer 14

isotopes

Question 15

are frequently used in medical diagnosis

Answer 15

radioactive tracers

Question 16

useful for diagnos heart disordrs and cancer and in brain research

Answer 16

PET (Positron-emission Tomography)

Question 17

a recording of electrical currents produced by the heart

Answer 17

electrocardiogram

Question 18

dissociated ions are sometimes called

Answer 18

electrolytes

Question 19

the formation of breaking of chemical bonds between atoms, ions, molecules, or compounds

Answer 19

chemical reaction

Question 20

substances that enter into a chemical reaction

Answer 20

reactants

Question 21

substances that result from the chemical reaction

Answer 21

products

Question 22

two or more reactants combine to form a larger, more complex product

Answer 22

Synthesis Reaction