Question : Which of the following statements is correct?

Option 1: Atomic radius increases across a period and decreases down a group in the periodic table.

Option 2: Atomic radius decreases across a period and increases down a group in the periodic table.

Option 3: Atomic radius decreases across a period and down a group in the periodic table.

Option 4: Atomic radius increases across a period and increases down a group in the periodic table.

Question : In which element group of the periodic table are fluorine, chlorine, bromine and iodine included?

Option 1: Actinides

Option 2: Chalcogen

Option 3: Lanthanides

Option 4: Halogens

Question : Among the given elements, which comes first in the periodic table of elements?

Option 1: Neon

Option 2: Sodium

Option 3: Silicon

Option 4: Potassium

Question : Which radioactive element with atomic number 43 in the modern periodic table is unstable, and the half-lives of all its isotopes are relatively short, from 4.2 million years to 5.0 s?

Option 1: Nobelium

Option 2: Promethium

Option 3: Neptunium

Option 4: Technetium

Question : Rocks that are formed by the cooling of magma are called:

Option 1: Sedimentary rocks

Option 2: Igneous rocks

Option 3: Metamorphic rocks

Option 4: Rock salts