Physical Science: The Periodic Table

What is formed when an atom gains or loses electrons?

• molecule

• ion

• neutral atom

Example of a transition metal

• Silver, Ag

• Sodium, Na

• Sulfur, S

• Argon, Ar

What family has 7 valence electrons?

• Alkali metals

• Transition metals

• Halogens

• Noble Gases

This type of element can conduct heat or electricity under certain conditions.

• Metals

• Semiconductors

• Nonmetals

Tags

NGSS.MS-PS3-4

Which element family is most reactive?

• Alkali

• Alkaline - Earth

• Noble Gas

How did Mendeleev arrange atoms in the periodic table?

• by atomic mass

• by atomic number

• by the number of electrons

• by the number of neutrons

Which statement about atoms of elements in a group of the periodic table is true?

• The have the same number of protons

• They have the same mass number

• They have similar chemical properties

• They have the same total number of electrons

The majority of elements in the periodic table are

• nonmetals

• conductors

• synthetic

• noble gases

Predict the charge of a magnesium, Mg, ion.

• +1

• +2

• -1

Answer explanation

Magnesium is in group 2. It has 2 valence electrons. To achieve a full outermost energy level, it will lose both electrons, forming a +2 charge,

What is a period on the periodic table?

• A row of elements

• A column of elements