The Periodic Table - Free MCQ Practice Test with solutions, Grade 7 Natural

Atoms of the same element have the same number of protons in the nucleus as each other.

Fr Francium - France, Po Polonium - Poland, Ge Germanium - Germany. There are several more!! I is the chemical symbol for iodine, a dark purple solid that is a member of the group of elements called the halogens.

Lithium floats on water because it is less dense than water (density of lithium is approximately 0.534 g/cm³, while water is 1 g/cm³). Lithium is a metal in Group 1 of the periodic table, known as the alkali metals, and its low density is a characteristic property of this group.

The chemical symbol Na represents the element sodium on the periodic table. Sodium is an alkali metal in Group 1, commonly encountered in scientific studies due to its reactivity and presence in compounds like sodium chloride (table salt).

Uranium was named after the planet Uranus.

The halogens are coloured elements - fluorine (symbol F) is a yellow-green gas.

The elements in Group 7 (also referred to as Group 17) of the periodic table are known as halogens, which include fluorine, chlorine, bromine, iodine, and astatine. These elements are all non-metals, characterized by their high electronegativity and reactivity.

Iron is represented by the chemical symbol Fe on the Periodic Table. It is a metal known for its strength and use in construction and manufacturing.

Neon gas is used in neon signs to produce the characteristic bright red-orange glow when electrically charged.

The lanthanides, a group of 15 metallic elements with atomic numbers 57 to 71, are collectively known as rare earth elements due to their scarcity and similar chemical properties.