1st Semester Final Practice

Front

What is Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23, which represents the number of atoms, molecules, or formula units in one mole of a substance.

Front

What are alkaline earth metals?

Back

Alkaline earth metals are the elements in group 2 of the periodic table, which include beryllium, magnesium, calcium, strontium, barium, and radium.

Front

Which element has the largest atomic radius?

Back

Francium has the largest atomic radius among the alkali metals.

Front

What happens to atomic size as you move across a period in the periodic table?

Back

As you move across a period, atomic size decreases due to the increase in nuclear charge, which pulls electrons closer to the nucleus.

Front

How many protons are in a titanium atom?

Back

A titanium atom has 22 protons.

Front

What is the significance of protons in an atom?

Back

Protons determine the atomic number of an element and its identity.

Front

What is the difference between atoms and molecules?

Back

Atoms are the basic units of matter, while molecules are formed when two or more atoms bond together.

Front

What is the periodic trend for ionization energy?

Back

Ionization energy generally increases across a period and decreases down a group in the periodic table.

Front

What is the definition of atomic radius?

Back

Atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons.

Front

What are the characteristics of noble gases?

Back

Noble gases are colorless, odorless, and inert gases that are found in group 18 of the periodic table.