Unit 1: Matter, Chemical Trends and Bonding

Question 1

What is an atom?

Answer 1

The smallest indivisible particle of matter

Question 2

What is an atom’s charge?

Answer 2

Neutral

Question 3

What is a proton’s charge?

Answer 3

Positive

Question 4

What is a neutron’s charge?

Answer 4

Neutral

Question 5

What is an electron’s charge?

Answer 5

Negative

Question 6

What is an amu?

Answer 6

atomic mass unit

Question 7

What is the number in the top right of an element on the periodic table?

Answer 7

The atomic number

Question 8

What is the number in the top left corner of an element on the periodic table?

Answer 8

The atomic mass

Question 9

What is an isotope?

Answer 9

A variety of an element with a different number of electrons

Question 10

To move to a higher energy level, what must electrons to?

Answer 10

Gain energy (become excited)

Question 11

To move back to their original energy, what must electrons do?

Answer 11

Lose energy

Question 12

Why do atoms need a full valence shell?

Answer 12

To be stable

Question 13

If an ion has a positive charge, what does it become?

Answer 13

A cation

Question 14

If an ion has a negative charge, what does it become?

Answer 14

An anion

Question 15

What is an ion?

Answer 15

An atom or molecule with a net electric charge due to loss or gain of one or more electrons

Question 16

What is ionization energy?

Answer 16

The amount of energy required to remove the outermost electron from an atom or ion in the gaseous state

Question 17

What is electron affinity?

Answer 17

The energy absorbed or released when an electron is added to a neutral atom

Question 18

What is electronegativity?

Answer 18

An indicator of the relative ability of an atom to attract shared electrons