A2 Chemistry Test on Periodic Trends

Front

What is a noble gas?

Back

Noble gases are a group of chemical elements that are odorless, colorless, monatomic gases with very low chemical reactivity. Examples include Helium, Neon, Argon, Krypton, Xenon, and Radon.

Front

Which group in the periodic table is known as the 'alkali metals'?

Back

Group 1 of the periodic table is known as the alkali metals. This group includes elements like Lithium (Li), Sodium (Na), and Potassium (K).

Front

What are the characteristics of noble gases?

Back

Noble gases are characterized by their full valence electron shell, making them very stable and nonreactive. They do not readily form chemical compounds.

Front

What is the special name for the group of elements in group IA?

Back

The group of elements in group IA is called the alkali metals.

Front

Which element in Period 3 has the lowest electronegativity?

Back

Sodium (Na) has the lowest electronegativity in Period 3.

Front

What is electronegativity?

Back

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. It is a key factor in determining how atoms interact in chemical bonds.

Front

What are halogens?

Back

Halogens are the elements found in Group 17 of the periodic table. They are known for their high reactivity and include Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), and Astatine (At).

Front

What is the significance of the periodic table's group number?

Back

The group number indicates the number of valence electrons in the elements of that group, which influences their chemical properties and reactivity.

Front

What is the trend in atomic radius across a period?

Back

The atomic radius generally decreases across a period from left to right due to increasing nuclear charge, which pulls the electrons closer to the nucleus.

Front

What is the trend in ionization energy down a group?

Back

Ionization energy generally decreases down a group because the outer electrons are further from the nucleus and are shielded by inner electrons, making them easier to remove.