Atomic Structure And Peridodic Table

Question 1

What are alkali metals?

Answer 1

The elements in Group 1 of the periodic table.

Question 2

Define atom.

Answer 2

The smallest part of an element that can exist.

Question 3

What is the atomic nucleus?

Answer 3

Positively charged object composed of protons and neutrons at the center of every atom with one or more electrons orbiting it.

Question 4

What does atomic number represent?

Answer 4

The number of protons in the nucleus.

Question 5

Define chromatography.

Answer 5

A separation technique used to separate a mixture of chemicals by distributing the components between two phases.

Question 6

What is a compound?

Answer 6

A substance made up of two or more types of atoms chemically combined together.

Question 7

Define crystallisation.

Answer 7

A separation technique used to produce solid crystals from a solution by evaporating the solvent.

Question 8

What is displacement in chemistry?

Answer 8

A chemical reaction in which a more reactive element displaces a less reactive element from its compound.

Question 9

What is an electron?

Answer 9

Negatively charged subatomic particle which orbit the nucleus at various energy levels.

Question 10

Define electron shell.

Answer 10

Different energy levels in atoms occupied by electrons.

Question 11

What is an element?

Answer 11

A substance made up of only one type of atom.

Question 12

What is filtration?

Answer 12

A separation technique used to separate solids from liquids.

Question 13

Define fractional distillation.

Answer 13

A method of separating a mixture of substances according to their different boiling points.

Question 14

What is a group in the periodic table?

Answer 14

The columns of the periodic table represent different groups of elements with similar properties.

Question 15

What are halogens?

Answer 15

The elements in Group 7 of the periodic table.

Question 16

Define ion.

Answer 16

An atom or molecule with an electric charge due to the loss or gain of electrons.

Question 17

What is an isotope?

Answer 17

Atoms of the same element with the same number of protons but a different number of neutrons.

Question 18

What does mass number indicate?

Answer 18

The total number of protons and neutrons in the nucleus.

Question 19

Define metals.

Answer 19

Elements that react to form positive ions, found to the left and towards the bottom of the periodic table.

Question 20

What is a mixture?

Answer 20

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

Question 21

What is a neutron?

Answer 21

Neutral subatomic particle present in the nucleus of the atom.

Question 22

What are noble gases?

Answer 22

The elements in Group 0 of the periodic table.

Question 23

Define non-metals.

Answer 23

Elements that react to form negative ions, found towards the right and top of the periodic table.

Question 24

What is the nuclear model?

Answer 24

The model stating that the mass was concentrated at the center of the atom and that the nucleus was charged.

Question 25

What is the periodic table?

Answer 25

Table of elements arranged in order of atomic number with elements of similar properties in the same column.

Question 26

Define plum pudding model.

Answer 26

Atomic model suggesting the atom is a ball of positive charge with negative electrons scattered through it.

Question 27

What is a proton?

Answer 27

Positively charged subatomic particle present in the nucleus of the atom.

Question 28

Define relative atomic mass.

Answer 28

An average value that takes account of the abundance of isotopes of the element.

Question 29

What is simple distillation?

Answer 29

A procedure by which two liquids with different boiling points can be separated.

Question 30

Define transition metals.

Answer 30

The collection of metallic elements in the middle of the periodic table.