Periodic Table and Trends

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom.

Front

How many valence electrons does an element in group number 15 have?

Back

An element in group number 15 has 5 valence electrons.

Front

Which element has a lower ionization energy than Scandium (Sc)?

Back

Calcium (Ca) has a lower ionization energy than Scandium (Sc).

Front

What does the atomic number represent?

Back

The atomic number represents the number of protons in the nucleus of an atom.

Front

Which of the following is not a noble gas: Helium, Radon, Iodine, Krypton?

Back

Iodine is not a noble gas.

Front

What is the periodic trend for ionization energy as you move across a period?

Back

Ionization energy generally increases as you move from left to right across a period.

Front

What is the periodic trend for atomic radius as you move down a group?

Back

Atomic radius generally increases as you move down a group in the periodic table.

Front

What is electronegativity?

Back

Electronegativity is a measure of the ability of an atom to attract electrons in a chemical bond.

Front

Which group of elements is known as the alkali metals?

Back

The alkali metals are found in group 1 of the periodic table.

Front

What is the significance of the period number in the periodic table?

Back

The period number indicates the highest energy level of electrons in an atom.