WorksheetsIntroduction to Chemistry Quiz
Total questions: 20
Worksheet time: 23mins
What is the basic unit of matter?
Atom
Molecule
Element
Compound
Which of the following is a noble gas?
Oxygen
Nitrogen
Helium
Carbon
Which part of the atom has a positive charge?
Neutron
Electron
Proton
Nucleus
The chemical formula for water is:
H2O
HO2
O2H
H2O2
What type of bond involves the sharing of electron pairs between atoms?
Ionic bond
Covalent bond
Metallic bond
Hydrogen bond
Which of the following pH values indicates a strong acid?
2
5
7
10
In which state of matter are particles most closely packed together?
Solid
Liquid
Gas
Plasma
What is the main component of air?
Hydrogen
Oxygen
Nitrogen
Carbon dioxide
The law of conservation of mass states that:
Mass can be created or destroyed
Mass can be converted into energy
The mass of reactants equals the mass of products
Mass is irrelevant in chemical reactions
Which of the following reactions is exothermic?
Photosynthesis
Melting of ice
Combustion of wood
Electrolysis of water
T/F: An element can be broken down into simpler substances.
T/F: Chemical reactions involve the rearrangement of atoms.
T/F: Water can exist in solid, liquid, and gaseous states.
T/F: Acids taste bitter and feel slippery.
T/F: The atomic number of an element is determined by the number of protons.
A substance made up of two or more different elements bonded together is called a (a) .
The periodic table is organized by increasing (a) number.
The process by which a liquid changes into a gas at temperatures below its boiling point is called (a) .
A (a) is a mixture in which one substance is dissolved in another.
The number of neutrons in an atom can be found by subtracting the atomic number from the (a) .
