Intro to Chemistry Review-AP Biology

Question 1

In chemical equilibrium, ______________________

Accepted Answer

Forward and reverse reactions are occurring at the same rate

Question 2

If a molecule is formed by a polar covalent bond, ___________________

Accepted Answer

The electron pair is shared unequally

Question 3

The innermost electron shell of an atom can hold up to ___________ electrons.

Accepted Answer

2

Question 4

An uncharged atom of boron has atomic # 5 and atomic mass 11. How many protons does it have?

Accepted Answer

5

Question 5

What are the six most important chemical elements of life?

Accepted Answer

carbon, nitrogen, oxygen, hydrogen, phosphate, sulfur

Question 6

Changing the number of _____________ would change an atom into an atom of a different element.

Accepted Answer

protons in an atom

Question 7

Which of these relationships is true of an uncharged atom?

Accepted Answer

The number of protons is equal to the number of electrons.

Question 8

Why is Carbon the most common element in organic chemistry? (there are 2 possible answers)

Accepted Answer

It is able to bond with many elements, It can form four bonds

Question 9

A(n) _____________ refers to two or more atoms held together by covalent bonds.

Accepted Answer

molecule

Question 10

The type of bond and # of covalent bonds an atom can form with other atoms is determined by

Accepted Answer

The number of unpaired electrons in the valence shell

Question 11

In table salt, what is the nature of the bond between sodium and chlorine?

Accepted Answer

ionic

Question 12

What is entropy?

Accepted Answer

disorder

Question 13

If two atoms are bonded with a polar covalent bond, which of the following is true?

Accepted Answer

One atom is more electronegative than the other.

Question 14

What shape does a carbon atom form when covalently bonded with four other elements?

Accepted Answer

Tetrahedron

Question 15

Which is an organic molecule?

Accepted Answer

CH4

Question 16

What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons?

Accepted Answer

6

Question 17

An atom of fluorine has atomic number 9 and atomic mass 19. How many neutrons does it have?

Accepted Answer

10

Question 18

A substance that cannot be broken down into other substances by ordinary chemical procedures is

Accepted Answer

an element

Question 19

Which subatomic particle has no charge?

Accepted Answer

neutron

Question 20

Which of these refers to atoms with the same atomic number, but different atomic masses?

Accepted Answer

These atoms are isotopes.

Question 21

What determines the type of chemical reactions an atom participates in?

Accepted Answer

the number of electrons in the outermost electron shell

Question 22

Which element is always associated with organic chemistry?

Accepted Answer

carbon

Question 23

What type of bond exists between potassium and chlorine?

Accepted Answer

ionic

Question 24

The atoms of different nitrogen isotopes _________________

Accepted Answer

Have different numbers of neutrons

Intro to Chemistry Review-AP Biology

Questions 24

Intro to Chemistry Review-AP Biology

Questions 24