P.1.2

Which statement best explains how the periodic table is organized?

• increasing atomic number from left to right

• increasing number of neutrons from left to right

• decreasing number of electrons from left to right

• decreasing atomic mass number from left to right

Where on the periodic table are you most likely to find elements that do not react with other elements?

• group 1

• group 2

• group 17

• group 18

Why are certain elements placed into the same column on the periodic table?

• They have the same number of protons in their nuclei.

• They have the same number of electrons in their nuclei.

• They have the same number of electrons in their outer energy level.

What physical property is characteristic of all of the elements in the group located in the rightmost column of the periodic table?

• very high melting point

• gas state at room temperature

• good conductor of electric current

• extremely brittle solid at room temperature

Elements in the same column of the periodic table of the elements all

• have the same number of protons.

• share the same atomic structure.

• have similar physical characteristics.

• share the same number of neutrons.

Which pair of elements has the most similar properties?

• Li and B

• I and Ca

• K and He

• N and P

The physical properties of element X are shown below.

malleable
ductile
shiny
conducts heat and electricity

Which most likely represents the identity of element X?

• carbon (C)

• copper (Cu)

• Iodine (I)

• Sulfur (S)

Sodium reacts with water. Which element is most likely to have a similar effect to sodium if it is exposed to water?

• carbon

• lithium

• oxygen

Tags

NGSS.MS-PS1-2

What is the significance of metalloids in the periodic table?

• They separate liquids from solids.

• They separate metals from nonmetals.

• They combine elements and compounds.

If an element has no electrons to share and is stable, what family is it found in?

• alkali metals

• noble gasses

• halogens