Fall Mid term Review

Front

What is the atomic number of Barium (Ba)?

Back

The atomic number of Barium (Ba) is 56.

Front

What is the formula to calculate mass from density and volume?

Back

Mass = Density × Volume.

Front

What is the mass of a block of steel with a density of 7.8 g/cm³ and a volume of 600 cm³?

Back

4680 g.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

Who proposed the idea that atoms could be divided?

Back

John Dalton proposed that atoms could be divided.

Front

What do all elements in the same period of the periodic table have in common?

Back

All elements in the same period have the same number of electron shells.

Front

What is the significance of the periodic table's groups?

Back

Elements in the same group have similar chemical properties due to having the same number of valence electrons.

Front

What is the definition of density?

Back

Density is the mass of an object divided by its volume (Density = Mass/Volume).

Front

What is the relationship between mass number and isotopes?

Back

Isotopes are variants of a chemical element that have the same number of protons but different mass numbers due to differing numbers of neutrons.

Front

What is the role of protons in an atom?

Back

Protons determine the atomic number and identity of an element.