Physical Science Retake review

What is the pH value of a neutral solution?

• 0

• 7

• 14

• 21

Which particle is found in the nucleus of an atom?

• Electron

• Neutron

• Proton

• Both B and C

Which group in the periodic table is known as the noble gases?

• Group 1

• Group 2

• Group 17

• Group 18

What is the atomic number of an element?

• The number of protons in the nucleus

• The total number of protons and neutrons in the nucleus

• The number of electrons in an atom

• The total mass of the atom

Which of the following is a chemical property?

• Boiling point

• Reactivity with water

• Color

• Density

What does the atomic mass of an element represent?

• The mass of the electrons in an atom

• The mass of the protons in an atom

• The total mass of the protons and neutrons in an atom's nucleus

• The total mass of the atom including its electrons

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

• Rusting of iron

• Burning of wood

• Melting of ice

• Cooking of an egg

What does the law of conservation of matter state?

• Matter can neither be created nor destroyed, but it can change forms.

• Matter is always in motion.

• The total mass of reactants equals the total mass of the products in a chemical reaction.

• Both A and C

Which of the following is a base?

• Vinegar

• Lemon juice

• Baking soda

• Tomato juice

What is the charge of an electron?

• Positive

• Negative

• Neutral

• Variable