Chemistry💉

Question 1

Atomic number

Answer 1

The number of protons in the nucleus of an atom

Question 2

Atomic mass

Answer 2

Mass of an average atoms of an element in an atomic mass units

Question 3

Protons

Answer 3

A positively charged particle forming part of the nucleus of an atom

Question 4

Neutron

Answer 4

Particle carrying no electric charge and forming part of the nucleus of an atom

Question 5

Electron

Answer 5

A negatively charged particle found orbiting the nucleus of an atom

Question 6

Atom

Answer 6

The smallest unit of matter that can take part in a chemical change

Question 7

Pure element

Answer 7

Seem kind of atom

Question 8

Philosopher

Answer 8

Study the principles of nature and the universe

Question 9

Alchemist

Answer 9

Goal is to turn any object into gold and find the fountain of youth

Question 10

Modern chemist

Answer 10

Study chemistry we know today

Question 11

Billiard ball model

Answer 11

Discovered compounds are created when atoms of different elements linked together in definite proportions

Question 12

Thompson’s plum pudding

Answer 12

Discovered electrons and that the items are not invisible

Question 13

Rutherford’s gold foil

Answer 13

Used radioactive particles shot at a very thin gold foil

Question 14

Bohr model

Answer 14

Try to solve the problem with in the nuclear model

Question 15

Chadwick

Answer 15

Discovered the neutron existed in the nucleus

Question 16

Why is the valence shell important

Answer 16

When two atoms approach each other and react with each other it is their outer shells that come into contact first and it is therefore the electrons in their outer shells that are normally involved in any chemical reaction

Question 17

Dalton’s atomic theory of matter

Answer 17

All matter is composed of atoms indivisible and indestructible building blocks while all atoms of an element were identical different elements had Atoms of different size

Question 18

What are five families of the periodic table

Answer 18

Noble gas, halogens, alkali, alkali earth metals, hydrogen

Question 19

Metals

Answer 19

Solid at room temperature, shiny Lester, good conductors of heat and electricity, malleable can be hammered into sheets, ductile can be drawn into wires

Question 20

Nonmetals

Answer 20

Over half gases at room temperature, go Lester, usually poor conductors of heat and electricity, brittle, nonductile

Question 21

Metalloids

Answer 21

Solid at room temperature, maybe shiny or Dahl, may conduct electricity, poor conductors of heat, brittle, nonductile

Question 22

Physical change

Answer 22

A change in matter in which no new substancesare formed examples ripping paper, cutting oranges,

Question 23

Matter

Answer 23

What everything is made up of

Question 24

Chemical change

Answer 24

A change in matter in which at least one new substance with new properties is formed

Question 25

Explain why the process of growing coffee is hard to classify as physical or chemical change

Answer 25

Boiling coffee involves a chemical change that delicate molecules that gives coffee its flavour, react with air and become a new bitter substance and physical

Question 26

Chemical bonding involves the interaction of the electrons in which shell?

Answer 26

The valence shell

Question 27

What is a anion

Answer 27

Negatively charged ion

Question 28

What is a ion

Answer 28

An atom or electron with a net electric charge due to the loss gain of an electron

Question 29

What is a cation

Answer 29

Positively charged ion

Question 30

When electrons are shared they are shared in….

Answer 30

Pairs

Question 31

What is a Single bond

Answer 31

When one pair the of electrons are being shared

Question 32

What is a double bond

Answer 32

When two pairs of electrons are being shared

Question 33

Triple bond

Answer 33

Three pairs are shared

Question 34

Polymer

Answer 34

A polymer is made up of a large number of similar units that are all bonded

Question 35

Monomer

Answer 35

Polymer is made up of monomers