Atomic Theory

Question 1

describes an atom as both indivisible and indestructible particle.

Answer 1

atomism

Question 2

Thought that primal matter was mad out of thought it was water.

Answer 2

Thales

Question 3

Thought that primal matter was air

Answer 3

Anaximenes

Question 4

thought primal matter was fire.

Answer 4

Heraclitus

Question 5

though primal matter Earth

Answer 5

Empedocles

Question 6

stated that all matter consists of tiny particles that were so tiny that they could not be further broken down into any smaller pieces.

Answer 6

Democritus

Question 7

He called these tiny particles as ———— which literally means indivisible.

Answer 7

atomos

Question 8

developed the first atomic theory and introduced the use of symbols to represent the elements.

These elements can combine to form compounds.

Answer 8

John Dalton

Question 9

Postulates of Dalton’s Atomic Theory

Answer 9

Postulate 1
Elements are composed of extremely small particles, called atoms

Postulate 2
All atoms of a given element are identical, having the same size, mass, and chemical properties. The atoms of one element are different from the atoms of all other elements.

Postulate 3
Compounds are composed of atoms of more than one element. In any compound, the ratio of the numbers of atoms of any two of the element present is either an integer or a simple fraction.

Postulate 4
A chemical reaction involves only the separation, combination, or rearrangement of atoms; it does not result in their creation or destruction.

Question 10

explain that, an element, regardless of size and source, have the same properties

Answer 10

Postulates 1 and 2

Question 11

only explains that when atoms combine, the ratio of the atoms involved must be a whole number, the ratio also plays a key role in the nature of the compound formed.

Answer 11

Postulate 3

Question 12

Which postulate states that when atoms combined, they are only separated, combined, or rearranged to form a new compound. The identity of the atoms involved are neither altered nor changed.

Answer 12

Postulate 4

Question 13

When did John Dalton develop the first atomic theory?

Answer 13

1803

Question 14

John Dalton developed the first atomic theory and introduced the use of ———- to represent the elements.

Answer 14

symbols

Question 15

elements can combine to form —————- .

Answer 15

compounds

Question 16

Dalton’s atomic model is represented as solid, hard spheres, like billiard (pool) ball as he thought that atoms were the smallest particles of matter.

Answer 16

Dalton’s billiard model of an atom

Question 17

explain that, an element, regardless of size and source, have the same properties.

Answer 17

Postulates 1 and 2

Question 18

explains that when atoms combine, the ratio of the atoms involved must be a whole number, the ratio also plays a key role in the nature of the compound formed.

Answer 18

Postulate 3

Question 18

The beginning of the ancient concept of an atom started when ————- stated that all matter consists of tiny particles that were so tiny that they could not be further broken down into any smaller pieces.

Answer 18

Democritus

Question 18

when atoms combined, they are only separated, combined, or rearranged to form a new compound. The identity of the atoms involved are neither altered nor changed.

Answer 18

fourth postulate