biochemistry

Question 1

Basic unit of matter

Answer 1

Atom

Question 2

Atoms are made of what 3 things?

Answer 2

Protons, neutrons, electrons

Question 3

Protons charge?

Answer 3

Positive

Question 4

Neutrons charge

Answer 4

Neutral/ no charge

Question 5

Electrons charge

Answer 5

Negative

Question 6

pure substance that consists entirely of one type of atom

Answer 6

Elements

Question 7

Atomic number

Answer 7

Number of protons in an element

Question 8

Mass number

Answer 8

Sum of protons and neutrons in an element to determine the atomic number of an element

Question 9

C^6

Answer 9

Atomic number

Question 10

C^6

12.01

Answer 10

Mass number

Question 11

What can you use to determine the atomic number of an element

Answer 11

Periodic table of elements

Question 12

What part of an atom is in constant motion

Answer 12

The electron

Question 13

Protons and netrons are located in what?

Answer 13

The nucleus

Question 14

isotope

Answer 14

atoms of an element that have different numbers of neutrons than that of other atoms of the same element

Question 15

isotopes are identified by their what?

Answer 15

mass #’s

Question 16

radioactive isotope

Answer 16

have nuclei that are unstable and break down at a constant rate over time

Question 17

Practical uses for radiation (4)

Answer 17

carbon dating
treating cancer
kill bacteria that caused food to spoil
act as labels/ tracers of substances in experiments.

Question 18

what is carbon dating?

Answer 18

determining the ages of rocks and fossils

Question 19

chemical compounds

Answer 19

substances formed by the chemical COMBINATION of 2 or more elements in definite proportions

Question 20

chemical formula

Answer 20

shows the composition of a chemical compond

Question 21

chemical formula for water

Answer 21

H2O

Question 22

cf for table salt

Answer 22

NaCl

Question 23

what is different between a compound and individual elements

Answer 23

the physical and chemical properties

Question 24

how are atoms in chemical compounds held together?

Answer 24

chemical bonds

Question 25

3 main types of chemical bonds

Answer 25

ionic and covalent

Question 26

ionic bond

Answer 26

formed when one or more electrons are transferred from one atom to another

Question 27

convalent

Answer 27

forms when electrons are shared between two atoms

Question 28

single-convalent

Answer 28

when the atoms share 2 electrons/ 1 pair

Question 29

double-convalent

Answer 29

when the atoms share 4 electrons/ 2 pairs