1 Chemistry Element Compount(DepEd)

What is represented by the letters found on each box of the Periodic Table?

• Atomic Number

• Density

• Chemical Symbol

• Mass Number

What is represented by the numbers found on each box of the Periodic Table?

• Atomic Number

• Density

• Chemical Symbol

• Mass Number

An atomic number is the number of protons in the nucleus of an atom

• True

• False

An atomic number is also the number of electrons in a neutral atom of that element.

• True

• False

When an atom has an equal number of protons and electrons, it is said to be

• neutral

• positively charged

• negatively charged

When an atom loses an electron, it becomes a

• neutral

• positively charged ion

• negatively charged

When an atom gains an electron, it becomes a

• neutral

• positively charged ion

• negatively charged ion

a form of a chemical element that has the same number of protons in its nucleus but a different number of neutrons.

• isotope

• ion

Nonmetals are known to be usually gases by state. Which nonmetal is considered as the gas of life?

• Carbon

• Neon

• Nitrogen

• Oxygen

What term refers to the horizontal lines that run from left to right across the Periodic Table?

• Dimensions

• Families

• Groups

• Periods