G8 Science M7 W1 (Quiz)

Who invented the Nuclear Model of an Atom?

• John Dalton

• Ernest Rutherford

• JJ Thomson

• Neils Bohr

4. The atomic number of an element indicates the number of ​ (a)   .

• protons in the nucleus
• neutrons in the nucleus
• electrons in the nucleus

He proposed that all substances are composed of four elements –

earth, fire, air, and water in different proportions.

• Bohr

• Brogile

• Aristotle

• Einstein

What is the chemical formula for an atom which has 77 protons and 74 electrons?

He created the special and general theories of relativity,

and he hypothesized the particle nature of light.

• Bohr

• Brogile

• Aristotle

• Einstein

How many electrons does Barium 2- have?

• 54

• 56

• 58

• 60

He proposed the planetary model of an atom.

• Bohr

• Brogile

• Aristotle

• Einstein

How many electrons does Yttrium 3+ have?

• 30

• 33

• 36

• 39

He discovered that electrons have a dual nature similar to both

particles and waves – particle/wave duality.

• Bohr

• Brogile

• Aristotle

• Einstein

What is the chemical formula for an atom which has 50 protons and 53 electrons?