Chemistry A - Periodic table and atomic structure

Question 1

Element

Answer 1

A substance made up of only one atom type

Question 2

Compound

Answer 2

A substance made up of two or more elements chemically combined

Question 3

Atomic mass

Answer 3

Protons + Neutrons

Question 4

Atomic number

Answer 4

Protons

Question 5

Isotopes

Answer 5

Atoms of the same element but contain a different number of nuetrons

Question 6

Rutherfords gold experiment

Answer 6

Fired alpha particles into gold foil
Most particles passed through but some got refracted
Proved atomic structure is mostly empty space with a small, positively charged nucleus

Question 7

Mendeleevs periodic table arrangement

Answer 7

arranged elements by atomic mass and left gaps for those undiscovered

Question 8

Modern periodic table arrangement

Answer 8

elements arranged my atomic number and elements in groups have similar properties

Question 9

Properties of alkali metals (group 1)

Answer 9

Soft
Low melting point
Conduct electricity

Question 10

Alkali metals (group 1) reaction with water

Answer 10

Fizzing / bubbling
Increases PH of solution (more alkaline)
Potassium produced lilac flame

Question 11

Properties of halogens (group 7)

Answer 11

Highly reactive
Low melting point
Low boiling point

Question 12

Properties of transition metals

Answer 12

Hard
Conduct heat and electricity
High melting / boiling point
Malleable