Science Practice

How are elements arranged in the periodic table?

• By increasing atomic mass

• By increasing atomic number

• Alphabetically

• Randomly

Which of the following does a group in the periodic table represent?

• The atomic mass of the element

• The number of valence electrons

• The total number of protons and neutrons

• The energy levels of electrons

Which elements are located on the left side of the periodic table?

• Non-metals

• Metals

• Metalloids

• Noble gases

What are metalloids?

• Elements with only metallic properties

• Elements with only non-metallic properties

• Elements with properties of both metals and non-metals

• Elements that are gases at room temperature

Which of the following is NOT a property of non-metals?

• Most are gases at room temperature

• Brittle in solid form

• Poor conductors of electricity

• Good conductors of electricity

What charge does a neutron have?

• Positive

• Negative

• Neutral

• Both positive and negative

Where are electrons located in an atom?

• Inside the nucleus

• Orbiting the nucleus in energy levels

• In the center with protons and neutrons

• Scattered randomly in the atom

What does the atomic number of an atom represent?

• The number of electrons

• The number of neutrons

• The number of protons

• The total number of protons and neutrons

What are energy levels in an atom?

• Regions where neutrons are located

• Areas around the nucleus where electrons move

• Layers of protons within the nucleus

• Boundaries separating different atoms

What are valence electrons?

• Electrons that are closest to the nucleus

• Electrons in the outermost energy level

• Neutrons that have gained energy

• Protons that bond with electrons