History of Elements, Periodic Table and Atom

The breaking down of a substance using electricity

Mendeleevs Periodic Table had no gaps

Group 8 is the most un-reactive group on the periodic table

Number of naturally occurring elements

Is water an molecule or a compound?

Which of the following is the odd one out

Neils Bohr proposed that electrons exist in energy levels around the nucleus

How many elements did the Greeks propose there was

Thomson measured the mass of an electron

Which of the following are properties of cathode rays (any one)

What particles did Rutherford fire at the gold foil during his experiments

The oil drop experiment was to measure the mass of an electron was conducted by

The name of group 7 elements are

Which of the statements about atomic number is incorrect

Which is the following is NOT a state of matter

a-tomos means divisible

Mendeleev arranged elements by...

Who discovered the neutron

Which of these was NOT an observation by Rutherford

Who proposed that matter consisted on tiny indivisble particles called atoms

What model of the atom is this?

Which of the states of matter has the least amount of energy

Arranged elements in Triads

Irish scientist that proposed the definition of an element

Proposed the law of octaves

Who discovered the nucleus of an atom