AP Biology Topic 1.2

Which 4 elements make up most of all living matter?

• Carbon, Hydrogen, Nitrogen, Oxygen
• Carbon, Oxygen, Sodium, Potassium
• Carbon, Hydrogen, Calcium, Nitrogen
• Carbon, Oxygen, Nitrogen, Sulfur

When atoms share electrons unequally...

• a nonpolar covalent bond is formed.
• an ionic bond is formed.
• a polar covalent bond is formed.
• a hydrogen bond is formed.

A substance that cannot be decomposed into simpler substances by chemical means - made up of the same atoms

• atom

• element

• molecule

• organism

Tags

NGSS.MS-PS1-1

A group of two or more atoms that are bonded together

• elements

• isotopes

• molecules

• essential elements of life

Tags

NGSS.MS-PS1-1

An atom that has a different number of neutrons than the standard for that element.

• element

• isotope

• molecule

• organism

Tags

NGSS.HS-PS1-8

What is the difference between carbon-12 and carbon-14? (Hint: 12 and 14 are mass #)

• The number of protons in the nucleus.
• The number of protons and neutrons in the nucleus.
• The number of neutrons in the nucleus.
• The number of electrons in the orbitals.

Tags

NGSS.MS-PS1-1

Electrons have what charge?

• Negative
• Positive
• Neutral
   (No Charge)

Tags

NGSS.MS-PS2-3

The nucleus of an atom is made up of...

• Protons and Neutrons
• Neutrons and Electrons
• Protons and Electrons

Tags

NGSS.MS-PS1-1

The image shows the periodic grid for POTASSIUM. What is Potassium's atomic number?

• 19
• 39
• 20
• Impossible to tell

The image shows the periodic grid for POTASSIUM. How many ELECTRONS are found in a potassium atom?

• 19
• 39
• 20
• Impossible to tell