The Atom - Term 1

Question 1

Who created the term matter?

Answer 1

Democritus

Question 2

Match the model to the scienteistr

2. 1. John Dalton - (a) The Wave Model
3. 2 J.J. Thomson - (b) The Bohr Model
4. 3 Ernest Rutherford - (c) The Billiard Ball Model
5. 4 Niels Bohr - (d) The Rutherford Model
6. 5 Erwin Schrödinger - (e) The Plum Pudding Model

Answer 2

2. 1 - c
3. 2 - e
4. 3 - d
5. 4 - b
6. 5 - a

Question 3

What is at the nucleus of the atom

Answer 3

protons + neutrons

Question 4

True of False:

The number of electrons in a neutral atom are equal to the number of protons

Answer 4

true

Question 5

How do you calculate atomic mass

Answer 5

The mass number is equal to
the number of protons plus
the number of neutrons

Question 6

True of False:

the number of electrons = the atomic number

Answer 6

false

Question 7

Calculate the relative atomic mass of the following:

35/17 Cl and 37/17 Cl w a frequency of 90% and 10% receptivity

Answer 7

75,35 a

Question 8

What are isotopes

Answer 8

atoms of the same elements but w/ different atomic masses

Question 9

Difference between a cation and an anion

Answer 9

Cations = metals losing an e-

Anions = non metals gaining a e-

Question 10

True or False:

If there is an ion we must fill in the valence e-

Answer 10

true

Question 11

True or False
In kinetic molecular theory states that the kinetic eneergy within gas particles is NOT directly proportionate to the tempertaure

Answer 11

false