Sample Quiz

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What is the radius of an atom?

0.1 nanometres

What can you find in the central nucleus?

Protons and Neutrons

Where are electrons found?

Electron Shells

What is the charge of each atom?

Proton, +1; Electron -1; Neutron, 0 Signup and view all the answers

What is the mass number?

The sum of protons and neutrons in the nucleus Signup and view all the answers

What is the atomic number?

The number of protons in the atom Signup and view all the answers

The number of protons = the number of electrons

True (A) Signup and view all the answers

What is an isotope?

Atoms of the same element with the same number of protons (mass number) but a different number of neutrons (atomic number) Signup and view all the answers

Who discovered the neutrons?

James Chadwick Signup and view all the answers

What did James Chadwick discover?

The existence of neutrons Signup and view all the answers

What did John Dalton’s theory say?

Atoms were tiny solid spheres that could not be divided Signup and view all the answers

Who made the plum pudding model?

JJ Thompson Signup and view all the answers

What did the Plum Pudding Model show?

Atoms were a ball of positive charge with negative electrons embedded in it Signup and view all the answers

Who made the Nuclear Model?

Ernest Rutherford Signup and view all the answers

What was the nuclear model experiment?

He fired a beam of Alpha particles at a thin gold foil and discovered very few were deflected by the nucleus. Signup and view all the answers

What did the nuclear model show?

The mass of the atom was concentrated in the centre of the atom Signup and view all the answers

Who made the Bohr Model?

Niels Bohr Signup and view all the answers

What did the Bohr Model discover?

Electrons orbit the nucleus at specific distances. Signup and view all the answers

What is the relative mass of an each sub atomic atom?

Proton, 1; Electron; Very Small; Neutron, 1 Signup and view all the answers

What is the atomic structure of Lithium? (7,3)

2,1 Signup and view all the answers

What is the atomic structure of oxygen? (16,8)

2,8,6 Signup and view all the answers

How many electrons can you fit on each shell?

First, 2; Second, 8; Third, 8; Fourth, 2 Signup and view all the answers

Radius of an atom

The size of an atom measured as 0.1 nanometers.

Electrons location

Electrons are found in electron shells surrounding the nucleus.