atoms

Question 1

• Extremely small particles.
• Basic building blocks of matter
• They join together to form molecules

Answer 1

Atoms

Question 2

What are atoms composed of?

Answer 2

Molecules ( made up of different atoms )

Question 3

What is the simple of Protons, Neutrons, and Electrons?

Answer 3

p^+, n^0, e^-

Question 4

Performed series of experiments in 1800, showing that matter consists of lumpy particles called “atoms”.

Answer 4

John Dalton

Question 5

According to dalton, matter is composed of what?

Answer 5

Indivisible particles called atoms

Question 6

According to Dalton, these are formed by a combination of two or more different kinds of atoms.

Answer 6

Compounds

Question 7

According to dalton, chemical reaction is a?

Answer 7

Rearrangement of atoms.

Question 8

The one who did the cathode ray tube experiment.

Answer 8

J.J. Thomson

Question 9

What are the two electrodes in a Cathode Ray Tube ?

Answer 9

Positive electrodes (anode) and Negative electrodes (cathode)

Question 10

Once you apply a sufficiently high voltage, a stream of electrons flows towards the “cathode”; this is what you call a?

Answer 10

Cathode Ray

Question 11

This was proposed by J.J. Thomson that proved the existence of electrons in an atom.

Answer 11

Plum Pudding

Question 12

He created Nuclear Model

Answer 12

Ernest Rutherford

Question 13

Atoms consist of ______, surrounded by electrpns moving around it.

Answer 13

Positively charged nucleus.

Question 14

What is the size of a nucleus?

Answer 14

Very Small

Question 15

electrons and the nucleus are held together by??

Answer 15

Force of attraction

Question 16

Atom, as a whole, is

Answer 16

Electrically Neutral

Question 17

He created the most widely accepted model of an atom.

Answer 17

Niels Bohr