Quarter 1 Assessment: Elements and Macromolecules

The number located at the top of an element is the ____.

• Mass number

• Neutrons

• Atomic number

• Symbol

The most important element that is the backbone of all biological molecules

• carbon
• nitrogen
• phosphorus
• sulfur

What kind of charge do electrons have?

• Positive charge

• No charge

• Negative charge

• Electric charge

Elements are made of 

• many types of atoms 
• the periodic table
• one type of atom 
• molecules 

What is the basic unit of matter and is the smallest particle of an element?

• Atoms
• Elements
• Compounds
• Molecules

Protons and neutrons clump together to form the __________ of an atom.

• nucleus
• centrosome
• outer shell
• orbital

Which of the following elements are found in all macromolecules? (Select all that apply).

• 
• 
• 
• 

A molecule is made up of ____ or more atoms.

• 1
• 2
• 3
• 4

Which part of an atom is represented by the blue circles?

• electrons

• neutrons

• protons

The image shows the periodic grid of potassium. How many electrons are found in the potassium atom?

• 19

• 20

• 39

• 40