Periodic Table

The majority of the elements on the periodic table fall into what class?

• Metals

• Nonmetals

• metaloids

• The periodic table is evenly split

Which of the following is the best comparison of metals and nonmetals?

• Metals are more brittle as a solid.

• Metals are better electrical and heat conductors.

• Nonmetals are more malleable as a solid

• Nonmetals are better conductors of heat.

How many protons, neutrons, and electrons are there in a neutral Al-27 atom?

• 13p, 13n, 13e

• 13p, 14n, 13e

• 14p, 13n, 13e

• 14p, 14n, 13e

Tags

NGSS.MS-PS1-1

There is a family of gases on the periodic table that is described as the inert gases. The word inert means chemically unreactive.  What family of gases are considered inert and why?

• Noble gases only react with each other.

• Halogens are less powerful when they react with other elements.

• Halogens are in Group 17 and only react with the elements of Group 1.

• Noble gases are not reactive which means their outer shell is full with 8 electrons.

Why do elements in the same group on the periodic table have similar chemical properties?

• The have the same number of valence electrons.

• They have the same number of neutrons.

• They have the same atomic number.

• They have the same atomic mass

How many valence electrons do alkali metals have?

• 1

• 2

• 3

• 7

Which of the following elements is most reactive?

• Na

• Mg

• Al

• Ar

Predict how many electron shells Strontium will have in a Bohr model.

• 1

• 2

• 5

• 7

Which of the two elements are most similar?

• Hydrogen and Helium

• Potassium and Calcium

• Magnesium and Sulfur

• Phosphorus and Nitrogen

What element is extremely reactive, but a poor conductor of heat and electricity?

• Sodium

• Magnesium

• Phosphorus

• Chlorine