Unit 1: Atoms to Molecules

Question 1

If we were labeling this Bohr Diagram, how should we label B?

Accepted Answer

Nucleus

Question 2

Based on the diagram, which two elements would have the most similar properties and why?

Accepted Answer

C and E because they are in the same group/family.

Question 3

Why did our understanding of the atom change through time?

Accepted Answer

New experiments helped us understand more about the atom.

Question 4

True or false? All solutions are mixtures but not all mixtures are solutions.

Accepted Answer

True

Question 5

What would the pH be for a neutral substance?

Accepted Answer

7

Question 6

What is the formula to calculate density?

Accepted Answer

Mass divided by volume

Question 7

How many protons would an atom of gold have?

Accepted Answer

79

Question 8

Which of the following is a mixture?

Accepted Answer

3

Question 9

Thomson found the negative charged particle & Rutherford found the proton. Chadwick found the:

Accepted Answer

Neutron

Question 10

Elements in the Periodic Table can be broken down into simpler substances by ordinary means.

Accepted Answer

False

Question 11

Neon has 10 protons. The rounded atomic mass is 20. How many electrons should there be?

Accepted Answer

10

Question 12

What is the measurement of an object's mass an example of?

Accepted Answer

Physical property

Question 13

What is a mixture where one substance is dissolved in another called?

Accepted Answer

solution

Question 14

True or false? In the Periodic Table elements in the same row have similar properties.

Accepted Answer

False

Question 15

Based on this Bohr diagram of the atom, which row of the Periodic Table is this element from?

Accepted Answer

3rd

Question 16

All subatomic particles have different charges in an atom. What is the charge of neutrons?

Accepted Answer

Neutral

Question 17

Which of the following is an example of a compound?

Accepted Answer

water

Question 18

What is a compound?

Accepted Answer

a combination of 2 or more different elements

Question 19

The elements on the Periodic Table are arranged by their physical properties and their…

Accepted Answer

Atomic number

Question 20

What does density measure?

Accepted Answer

How tightly packed particles are in a given space

Question 21

What are the subatomic particles in the nucleus of the atom called?

Accepted Answer

Protons and Neutrons

Question 22

When an acid and base are combined, they form water and a __________?

Accepted Answer

salt

Question 23

True or false? The density of a substance depends on how much substance you have.

Accepted Answer

False

Question 24

Characteristics that can be observed or measured without changing the substance's identity are:

Accepted Answer

Physical properties

Question 25

True or false? A solution can be easily separated.

Accepted Answer

True

Question 26

Based on this Bohr diagram, how many electrons are there?

Accepted Answer

6

Unit 1: Atoms to Molecules

Questions 26

Unit 1: Atoms to Molecules

Questions 26