In which part of the periodic table are the most reactive nonmetals located?

• entire row at the top end of the table

• the rows at the bottom of the table that connect two sections

• the column at the far left of the table

• the second column from the right of the table

Which best explains how elements are arranged on the modern periodic table?

• Elements are arranged from fewest protons to most protons.

• Elements are arranged from most protons to fewest protons.

• Elements are arranged from fewest neutrons to most neutrons.

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

• coal

• oxygen

• lithium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which elements are most likely to react in the same manner in a chemical reaction?

• elements in the same group

• elements in the same period

• elements with similar atomic masses

Why does reactivity in non-metals most likely increase from left to right in the periodic table?

• atomic radius increases

• attraction for electrons increases

• attraction for electrons decreases

Tags

NGSS.HS-PS1-2

Which best explains why the alkali metals are the most reactive group in the periodic table?

• They are radioactive.

• They have complete outer energy levels.

• They have the highest atomic masses of any elements.

• They have only one electron in their outer energy level.

Which best explains how the periodic table is used to identify properties of elements?

• by the color and shape of the elements

• by the number of electrons in the elements

• by the group in which the elements are located

Properties such as magnetism, luster, and malleability have been used to group together which category of elements on the periodic table?

• metals

• nonmetals

• metalloids

• noble gases

Tags

NGSS.MS-PS2-3

A material can be identified by its behavior when chemically combined. Which property best supports this statement?

• density

• reactivity

• specific heat

• melting point

Tags

NGSS.MS-PS1-2

Johnny is trying to identify a sample of a highly reactive nonmetal. With which elements would his sample most likely be found on the periodic table?

• neon (Ne) and radon (Rn)

• fluorine (F) and bromine (Br)

• silicon (Si) and phosphorous (P)

• sodium (Na) and magnesium (Mg)