The Periodic Table questions

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The Periodic Table question collection

Review The Periodic Table questions for Chemistry, with correct answers shown and coverage across groups and periods in the periodic table; metals and non-metals and where they sit; properties of Group 1, Group 7 and Group 0.

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Question 1

Which formula represents a compound?
  1. CO2
  2. O2
  3. N2
  4. Ar

Question 2

Which subatomic particle has a positive charge?
  1. Proton
  2. Electron
  3. Neutron
  4. Isotope

Question 3

Which subatomic particle has no charge?
  1. Neutron
  2. Proton
  3. Electron
  4. Nucleus

Question 4

What does atomic number tell you?
  1. The number of protons
  2. The number of neutrons
  3. The total number of particles in the nucleus
  4. The number of electron shells

Question 5

Which symbol represents potassium?
  1. K
  2. P
  3. Po
  4. Pt

Question 6

The periodic table is arranged in order of increasing?
  1. Atomic number
  2. Mass number
  3. Number of isotopes
  4. Reactivity

Question 7

What are vertical columns in the periodic table called?
  1. Groups
  2. Periods
  3. Blocks
  4. Shells

Question 8

What are horizontal rows in the periodic table called?
  1. Periods
  2. Groups
  3. Blocks
  4. Shells

Question 9

Why are Group 0 elements usually unreactive?
  1. They have full outer shells
  2. They have one outer electron
  3. They have seven outer electrons
  4. Their proton and electron numbers match

Question 10

Most metals are found on which side of the periodic table?
  1. Left-hand side
  2. Right-hand side
  3. The middle
  4. In Group 0

Question 11

What did Mendeleev use periodic-table gaps to predict?
  1. Properties of undiscovered elements
  2. Proton numbers of known elements
  3. Isotope counts for each element
  4. Electron arrangements of each element

Question 12

Why can scientists replace an atomic model?
  1. New evidence does not fit the old model
  2. A new model is easier to draw
  3. Most scientists vote for a change
  4. The old model reaches a fixed age

Question 13

What is fixed in every sample of a pure compound?
  1. The ratio of its elements
  2. The sample's mass
  3. The physical state
  4. The number of particles

Question 14

Which pair correctly matches symbol and element?
  1. Na - sodium
  2. S - silicon
  3. Cl - calcium
  4. Mg - manganese

Question 15

Which charge does an electron have?
  1. Negative
  2. Positive
  3. Neutral
  4. Variable

Question 16

Which property of an element equals its period number?
  1. Occupied electron shells
  2. Outer electrons
  3. Protons
  4. Neutrons

Question 17

What is a mixture?
  1. Substances not chemically bonded
  2. Elements chemically bonded
  3. One atom type only
  4. Ions in a fixed ratio

Question 18

Which change forms a positive ion from an atom?
  1. Electron loss
  2. Electron gain
  3. Proton loss
  4. Neutron gain

Question 19

Which particles have similar relative masses?
  1. Protons and neutrons
  2. Protons and electrons
  3. Neutrons and electrons
  4. Electrons and photons

Question 20

Where are protons and neutrons found?
  1. In the nucleus
  2. In electron shells
  3. Outside the atom
  4. In a chemical bond

Question 21

Which change forms a negative ion from an atom?
  1. Electron gain
  2. Electron loss
  3. Proton gain
  4. Neutron loss

Question 22

Which formula represents a molecule of an element?
  1. O2
  2. CO2
  3. H2O
  4. NaCl

Question 23

What does a chemical symbol represent?
  1. An element
  2. A mixture
  3. A complete reaction
  4. A state of matter

Question 24

Which property is typical of most metals?
  1. Good conduction of heat
  2. Brittle when solid
  3. Dull appearance
  4. Low melting point

Question 25

What do non-metal oxides usually form when dissolved in water?
  1. An acidic solution
  2. An alkaline solution
  3. A neutral solution
  4. A saturated solution

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Review The Periodic Table questions for Chemistry, with correct answers shown and coverage across groups and periods in the periodic table; metals and non-metals and where they sit; properties of Group 1, Group 7 and Group 0.

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