7th Grade Atoms and Elements Test

Water is a _____

• proton

• neutron

• atom

• molecule

Tags

NGSS.MS-PS1-1

Molecules are composed of more than one __________?

• molecules
• compounds
• elements
• particle

Tags

NGSS.MS-PS1-1

The chemical formula for table salt is NaCl.

Identify the elements and the kind of chemical formula.

• The elements are sodium (Na) and bromine (Br).
• The chemical formula is a complex molecular compound.
• The elements are potassium (K) and fluorine (F).
• The elements are sodium (Na) and chlorine (Cl). The chemical formula is a simple ionic compound.

Tags

NGSS.MS-PS1-1

What is the symbol for CHLORINE?

• Cl
• Ch
• Cl2
• C1

What is the symbol for MAGNESIUM?

• M
• Mg
• Mg2
• Ma

What is the symbol for COPPER?

• Co
• Cu
• CuO
• C

What part of the atom has a negative charge?

• Electrons
• Protons
• Nuclei
• Neutrons

A pure substance made of just one kind of atom is called_________

• compound
• mixture
• element
• solution

What is the center part of an atom called?

• nucleus
• proton
• electron
• core

Tags

NGSS.MS-PS1-1

What four elements make up almost all living things?

• Iron, magnesium, zinc, copper
• Calcium, phosphorus, potassium, sulfur
• Carbon, hydrogen, oxygen, nitrogen
• Sodium, chlorine, iodine, fluorine