Chemistry and Periodic Table Basics

The elements on the Periodic Table are arranged in order of increasing

• atomic mass

• atomic number

• oxidation number

• formula units

The elements in Group 2 are classified as

• metals

• metalloids

• nonmetals

• noble gases

Compared to the atoms of nonmetals in Period 3, the atoms of metals in Period 3 have

• fewer electron shells

• more electron shells

• more valence electrons

• fewer valence electrons

Tags

NGSS.HS-PS1-1

Which list of elements contains a metal, a metalloid and a nonmetal?

• Ag, Si, I₂

• Ge, As, Ne

• K, Cu, Br₂

• S, Cl₂, Ar

Which property can be defined as the ability of a substance to be hammered into thin sheets?

• conductivity

• malleability

• melting point

• solubility

At STP, which element is a good conductor of electricity?

• chlorine

• iodine

• silver

• sulfur

Which elements have the most similar chemical properties?

• Si, As, and Te

• Mg, Sr, and Ba

• N₂, O₂, and F₂

• Ca, Cs, and Cu

Which list represents the classification of the elements nitrogen, neon, magnesium and silicon, respectively?

• metal, metalloid, nonmetal, noble gas

• nonmetal, noble gas, metal, metalloid

• nonmetal, metalloid, noble gas, metal

• noble gas, metal, metalloid, nonmetal

At STP, O₂(g) and O₃(g) are two forms of the same element that have

• the same molecular structure and the same properties

• the same molecular structure and the different properties

• different molecular structure and the same properties

• different molecular structure and different properties

Tags

NGSS.MS-PS1-1

Which element tends not to react with other elements?

• helium

• hydrogen

• phosphorus

• potassium