Which statement correctly compares an atom of an alkali metal with an atom of the alkaline earth metal next to it on the periodic table?

the alkali metal atom forms a +1 ion, while the alkaline earth metal atom forms a +2 ion.
the alkali metal atom forms a +2 ion, while the alkaline earth metal atom forms a +1 ion.
the alkali metal atom has one less shell of electrons than the atom of the alkaline earth metal.
the alkali metal atom has one more shell of electrons than the atom of the alkaline earth metal.

The alkali metal atom forms a +1 ion, while the alkaline earth metal atom forms a +2 ion.

Explanation: Group 1 elements are called as alkali metals and group 2 elements are called as alkaline earth metals.

For example, Li is an alkali metal and Be is an alkaline earth metal.

Lithium(Li) has an atomic number of 3 and the electronic configuration is:

Li:

Thus lithium has to lose 1 electron and acquire 1+ charge to attain nearest noble gas configuration.

Berrylium(Be) has an atomic number of 4 and the electronic configuration is:

Be:

Thus berrylium has to lose 2 electrons and acquire 2+ charge to attain nearest noble gas configuration.

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds