Periodic Table Test Review

An atom has 26 protons and 24 electrons, which element is this?

• Sodium

• iron

• sulfur

• neodymium

Tags

NGSS.MS-PS1-1

Which is the smallest part of an element that retains all of the properties of the element?

• proton

• electron

• neutron

• atom

What does 2 represent?

• chemical symbol

• oxidation number

• atomic number

• atomic mass

What does 1 represent?

• Chemical symbol

• oxidation number

• atomic number

• atomic mass

What does 3 represent?

• chemical symbol

• oxidation number

• atomic number

• atomic mass

Which statement about the atomic nucleus is correct?

• The nucleus is made of protons and neutrons and has a negative charge

• The nucleus is made of protons and neutrons and has a positive charge.

• The nucleus is made of electrons and has a positive charge

• The nucleus is made of electrons and has a negative charge

A neutral atom of gallium (Ga) contains how many electrons?

• 15

• 16

• 31

• 69

Atoms in Group 18 elements are inert (chemically unreactive) because

• they combined to form molecules.

• they have no valence electrons.

• they have filled inner energy levels.

• they have a full valence shell.

A student was examining a sample of an element in a gaseous state at room temperature, and found after heating that it has a low melting point and boiling point. In which family below would the element be grouped?

• Carbon Family

• Alkali Metals

• Halogens

• Transition Metals

Tags

NGSS.MS-PS1-4

An element exhibits the following characteristics. It is brittle, lustrous, not ductile or malleable, a good conductor when cool, and has an average transmission of heat. What type of element is this?

• Metal

• Metalloid

• Gas

• Non-metal