Chemistry semester 1

All atoms are ____.

• positively charged, with the number of protons exceeding the number of electrons

• negatively charged, with the number of electrons exceeding the number of protons

• neutral, with the number of protons equaling the number of electrons

• neutral, with the number of protons equaling the number of neutrons

The nucleus of an atom is ____.

• composed of protons and neutrons

• has more protons than neutrons

• contains protons and electrons

• consists of electron and neutrons

Isotopes of the same element have different ____.

• positions on the periodic table

• chemical behavior

• atomic numbers

• mass numbers

A scientific investigation always begins with a 

• hypothesis
• research
• conclusion
• question

Which of the following is an example of a mixture?

• Water
• Oxygen
• Sodium Chloride
• lemonade

Flammability is an example of a 

• state of matter
• physical property
• chemical property
• chemical formula

Which of the following is an example of a chemical change?

• boiling water
• crushing a can
• tearing a paper
• burning a paper

How many protons does an atom of Carbon have?

• 6
• 4
• 12
• 14

Blue Color: Chemical or Physical Property

• Chemical Property
• Physical Property

Density: Chemical or Physical Property

• Chemical Property
• Physical Property