Science · Chemistry
Atoms and Elements Quiz
Protons, neutrons, electrons, elements, compounds and the periodic table.
- 🎓 Grades 6–8
- 🧪 Science
- 📐 MS-PS1-1
- ❓ 20 questions
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What is the smallest unit of an element that keeps its properties?
- A A molecule of water
- B An atom
- C A cell
- D A crystal
Which particle in an atom has a positive charge?
- A Electron
- B Neutron
- C Proton
- D Photon
Which particle in an atom has a negative charge?
- A Electron
- B Proton
- C Nucleus
- D Neutron
Which particle in an atom has no charge?
- A Electron
- B Neutron
- C Proton
- D Ion
Where are protons and neutrons found?
- A Outside the atom
- B In the electron cloud only
- C Orbiting the nucleus
- D In the nucleus
What does an element's atomic number tell you?
- A The number of protons
- B Its melting point
- C The number of neutrons only
- D Its weight in grams
Who created an early version of the periodic table in 1869?
- A Marie Curie
- B Albert Einstein
- C Dmitri Mendeleev
- D Isaac Newton
What are the rows of the periodic table called?
- A Groups
- B Families
- C Columns
- D Periods
What are the columns of the periodic table called?
- A Groups
- B Rows
- C Levels
- D Periods
Elements in the same group have…
- A No electrons
- B The same number of protons
- C Similar properties
- D The same mass
What is a compound?
- A A mixture you can sort by hand
- B A charged particle
- C Two or more elements chemically joined
- D A single kind of atom
Water (H₂O) is made of which elements?
- A Hydrogen and oxygen
- B Carbon and oxygen
- C Helium and oxygen
- D Hydrogen and nitrogen
Table salt (NaCl) is made of which elements?
- A Nitrogen and carbon
- B Sulfur and chlorine
- C Sodium and chlorine
- D Neon and calcium
What gas makes up most of the air we breathe?
- A Nitrogen
- B Carbon dioxide
- C Hydrogen
- D Oxygen
Which group of elements rarely reacts with others?
- A Noble gases
- B Metals
- C Halogens
- D Alkali metals
Where are metals found on the periodic table?
- A Only on the far right
- B Only in the top row
- C On the left and center
- D Only at the bottom
How many elements are on the periodic table today?
- A 150
- B 92
- C 118
- D 100
Two or more atoms bonded together form a…
- A Molecule
- B Mixture
- C Proton
- D Nucleus
How many hydrogen atoms are in one water molecule?
- A 4
- B 1
- C 2
- D 3
Which properties do most metals share?
- A Gas at room temperature
- B Dull and brittle
- C Shiny and good conductors
- D Poor conductors of heat
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