Atoms and elements
Grade 8: atoms, elements and symbols, the periodic table, compounds.
Free to play. Teams answer on one screen; your phone is the remote. No student devices.
Questions
Which particle in an atom has a positive charge?
- Electron
- Neutron
- Photon
- Proton
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ProtonWhere is most of the mass of an atom found?
- In the electrons
- In the nucleus
- In the outer shells
- Spread evenly everywhere
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In the nucleusAn atom that is not an ion has equal numbers of protons and electrons. (True or false?)
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TrueAn atom has 6 protons and 8 neutrons. How many electrons does it have? (Answer out loud)
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6What is the chemical symbol for sodium?
- Na
- S
- Sd
- So
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NaWhich element has the symbol Fe?
- Fluorine
- Francium
- Iron
- Lead
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IronThe symbol for gold is Au. (True or false?)
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TrueWhat does the atomic number of an element tell you?
- The mass of the atom
- The number of neutrons
- The number of protons
- The number of shells
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The number of protonsIn the periodic table, what are the vertical columns called?
- Families of rows
- Groups
- Periods
- Series
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GroupsWhich group of very unreactive gases is on the far right of the periodic table? (Answer out loud)
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The noble gases (Group 18 or 0)Elements in the same group have similar properties because they have the same number of what?
- Electron shells
- Neutrons
- Outer electrons
- Total protons
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Outer electronsWhat is a compound?
- A single type of atom
- A very small atom
- Two or more elements chemically joined
- Two or more elements just mixed
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Two or more elements chemically joinedHow many atoms are in one molecule of water, H2O? (Answer out loud)
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3Salt water is a compound of salt and water. (True or false?)
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FalseWhich of these is a compound?
- Carbon dioxide
- Helium
- Nitrogen
- Oxygen
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Carbon dioxideHow many oxygen atoms are in one molecule of H2SO4?
- 1
- 2
- 4
- 6
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4