TIMSS - CHEM 1 - Composition of Matter

The particles with no charge in an atom are the _______.

• electrons
• neutrons
• protons
• protons and neutrons

The positively charged particles of an atom are the ________.

• electrons
• protons
• neutrons
• protons & neutrons

The negatively charged particles of an atom are the ______.

• electrons
• protons
• neutrons
• protons & neutrons

The center of an atom that holds protons and neutrons?

• model
• electron
• nucleus
• neutron

What is the tiniest particle in the entire universe?

• cells
• gases
• atoms
• liquids

What is the term for combining 2 or more DIFFERENT atoms together?

• atoms
• elements
• molecules
• compounds

What is the term for combining 2 or more atoms together?

• atoms
• elements
• molecules
• compounds

What is the picture displayed?

• atom
• element
• molecule
• compound

The chemical symbol for Oxygen is

• Ox
• Og
• O
• On

Water compound

• NaCl
• H2O
• Protein
• CaCO