Ch 10 The Building Blocks of the Chemical World

Question 1

what is an atom

Answer 1

a tiny particle

Question 2

what is an element

Answer 2

a substance made up of only one type of atom

Question 3

what are subatomic particles

Answer 3

smaller particles and atom is made up of

Question 4

what are the three types of subatomic particles

Answer 4

protons, neutrons, electrons

Question 5

name the mass and charge of each subatomic particle

Answer 5

proton- 1- positive charge
neutron-1- neural charge
electron- 1/1836- negative charge

Question 6

do protons and neutrons have the same mass

Answer 6

yes

Question 7

what is the atomic number

Answer 7

the number of protons in the atom of that element

no. protons = no. electrons

Question 8

what is the mass number

Answer 8

the total number of protons and neutrons in an atom

Question 9

how many electrons are in the first shell of an atom

Answer 9

2

Question 10

how many electron are in the second shell of an atom

Answer 10

8

Question 11

how many electrons i the third shell of an atom

Answer 11

8

Question 12

what is electronic configuration

Answer 12

describing the location of electrons in an atom

Question 13

what are isotopes

Answer 13

atoms with the same number of protons but different numbers of neutrons

Question 14

what does the periodic table do

Answer 14

it groups elements to show patterns in their properties

Question 15

what are groups

Answer 15

the vertical columns of elements in the periodic table

Question 16

what are periods

Answer 16

the horizontal rows of elements across the periodic table

tie tells us the number of shells and atom has

Question 17

what is an alloy

Answer 17

a mixture of metals e.g. copper and tin makes bronze