molecules of life

Question 1

anything that occupies space and has mass

Answer 1

matter

Question 2

composed of particles distributed non-uniformly

mixture

Answer 2

heterogeneous mixture

Question 3

composed of particles distributed uniformly

mixture

Answer 3

homogeneous mixture

Question 4

‘atomos’ meaning

Answer 4

invisible

Question 5

smaller particles that make up an atom

Answer 5

electrons, protons, neutrons

Question 6

consists of a cloud of electrons surrounding a small, dense nucleus of protons & neutrons

Answer 6

atom

structure

Question 7

contains nearly all mass of an atom despite occupying only little space

Answer 7

nucleus

Question 8

tiny, negatively charged particles that form a cloud around the nucleus of an atom

Answer 8

electron

Question 9

one of the lightest particles with a known mass
discovered by Joseph John Thomson

Answer 9

electron

Question 10

positively charged particles in the nucleus

Answer 10

protons

Question 11

discoverer of protons

Answer 11

joseph john thomson 1919

Question 12

neutral particles in nucleus

Answer 12

neutrons

Question 13

discoverer of neutrons

Answer 13

James Chadwick 1932

Question 14

seven (7) major elements in living systems

Answer 14

• carbon
• hydrogen
• oxygen
• nitrogen
• phosphorus
• sulfur
• calcium

Question 15

main composition of organic compounds

Answer 15

carbon

Question 16

Major source of fuel in the production of energy

Answer 16

hydrogen

Question 17

Essential part of water molecule and organic compounds

Answer 17

oxygen

Question 18

Key element in proteins

Answer 18

nitrogen

Question 19

Major component of nucleic acids and vitamins

Answer 19

phosphorus

Question 20

Part of some amino acids and vitamins

Answer 20

sulfur

Question 21

Major component of bones and acts as biological signals in the body

Answer 21

calcium

Question 22

other elements in living systems & their functions

Answer 22

• sodium
• potassium
• iodine

Question 23

elements essential for nerve function

Answer 23

sodium & potassium

Question 24

element that acts as a thermostat to regulate body temperature

Answer 24

iodine

Question 25

element needed by plants to incorporate nitrogen into a biologically useful substance

Answer 25

molybdenum

Question 26

element that is an important component of bones, teeth, and chlorophyll

Answer 26

magnesium

Question 27

element that is a carrier of oxygen in the blood

Answer 27

iron

Question 28

three (3) kinds of bonds

Answer 28

- ionic - covalent - hydrogen

Question 29

ion attraction - & + | kind of bond

Answer 29

ionic bond

Question 30

shared electron of the atoms of element | kind of bond

Answer 30

covalent bond

Question 31

weak bond between hydrogen & other atom | kind of bond

Answer 31

hydrogen bond