C1 The Atom

Question 1

Name all models of the atom

Answer 1

• Daltons model
• The plum pudding model
• Alpha scattering experiment
• Nuclear model
• Bohr model

Question 2

What do atoms contain?

Answer 2

• Electrons
• Protons
• Neutrons

Question 3

What is the radius of the atom?

Answer 3

0.1 nanometers

Question 4

What is the Relative Mass of Proton?

Answer 4

+1

Question 5

What is the Relative Mass of Neutrons?

Answer 5

+1

Question 6

What is the Relative Mass of Electons?

Answer 6

Near 0/Very small

Question 7

What is the charge of protons?

Answer 7

+1

Question 8

What is the charge of Neutrons?

Answer 8

0

Question 9

What is the charge of Electrons?

Answer 9

-1

Question 10

What is an ion?

Answer 10

An ion is an atom or group of atoms that has lost or gained electrons.

Question 11

What is an element?

Answer 11

A substance that only contains atoms with the same number of protons

Question 12

What are isotopes?

Answer 12

Isotopes are different forms of the same element which have the same number of protons but a different number of neutrons

Question 13

What is the formula of the relative atomic mass?

Answer 13

Relative Atomic mass =
sum of (isotope abundance x isotope mass number) divided by sum of abundance of all the isotopes

Question 14

What are compounds?

Answer 14

Compounds are substances formed from two or more elements which are held together by chemical bonds.

Question 15

What is a mixture?

Answer 15

A mixture consists of two or more elements or compounds that are not chemically combined together

Question 16

How can you seperate mixtures?

Answer 16

• Filtration
• Crystilization
• Simple distillation
• Fractional distillation
• chromotography

Question 17

What is an atom?

Answer 17

Smallest part of an element that can exist

Question 18

What is daltons model of the atom?

Answer 18

Atoms as solid spheres that could not be divided into smaller parts

Question 19

What is the plum pudding model of the atom?

Answer 19

Sphere of positive charge with negative electrons embedded in it

Question 20

What did scientists discover in the alpha scattering experiment?

Answer 20

Some alpha particles were deflected by the gold foil - this showed that an atoms mass and positive charge must be concentrated in one small space (the nucleus)

Question 21

What did Bohr discover?

Answer 21

electrons orbit in fixed energy levels (shells)

Question 22

What did Chadwick discover?

Answer 22

Uncharged particle called the neutron

Question 23

Describe the nuclear model of the atom

Answer 23

Dense nucleus with electrons orbiting it