Chemical Elements (Section 2)

Question 0

What weight more than the “standard” atoms?

Answer 0

Isotopes

Question 1

What is an isotope?

Answer 1

Atoms of the same element with a varying amount of neutrons

Question 2

Isotopes have the same amount of —- as normal atoms

Answer 2

Protons

Question 3

What is a radioactive isotope?

Answer 3

A isotope in which the nucleus decays spontaneously and gives off particles and energy

Question 4

Examples of radioactive isotopes in biology?

Answer 4

Date fossils (consist of carbon 12&14)

Question 5

True if false: atoms are mostly empty space

Answer 5

True

Question 6

What are chemical reactions?

Answer 6

The making and breaking of bonds creating a new substance

Question 7

Energy is?

Answer 7

The ability to do work

Question 8

Potential energy is?

Answer 8

Energy stored due to its position or location

Question 9

Matter has a tendency to move to?

Answer 9

The lowest possible state of potential energy

Question 10

Energy levels are also?

Answer 10

Electron shells

Question 11

The first electron shell?

Answer 11

Closest to the nucleus and has the lowest energy. it holds 2 electrons

Question 12

The second electron shell?

Answer 12

Has more energy than the first and can hold eight electrons

Question 13

How many electrons can the third shell hold?

Answer 13

Eight

Question 14

The chemical behavior of an atom depends on?

Answer 14

The electron configuration

Question 15

What should happen in the outer shell?

Answer 15

It should be full

Question 16

The outer electrons are also called?

Answer 16

Valence electrons

Question 17

The outermost shell is also called?

Answer 17

The valence shell

Question 18

An orbital is?

Answer 18

3-D space where electrons spend 90% of the time