Question

Calcium reacts with bromine to form calcium bromide. 2.1 Which atom will lose electrons? 2.2 How many electrons will it lose? 2.3 Name the element that will gain electrons. 2.4 How many electrons does this atom gain? 2.5 Write down the symbol for each of the ions formed. 2.6 Write the chemical formula for calcium bromide.

Answer 1

Answer:

For 2.1: Calcium atom will loose electrons.

For 2.2: It will loose 2 electrons.

For 2.3: Bromine atom will gain electrons.

For 2.4: It will gain 1 electron.

For 2.5: The ions formed are $Ca^{2+}\text{ and }Br^-$

For 2.6: The chemical formula is $CaBr_2$

Explanation:

Calcium bromide is formed by the combination of calcium and bromine atoms. This compound is ionic compound because electrons get transferred from one atom to another atom.

Calcium is the 20th element of the periodic table. It is a metal and it looses its electrons. The electronic configuration for this element is $1s^22s^22p^63s^23p^64s^2$

This element will loose 2 electrons and forms $Ca^{2+}$ ion.

Bromine is the 35th element of the periodic table. It is a non-metal and it gains electrons. The electronic configuration for this element is $[Ar]4s^23d^{10}4p^5$

This element will gain 1 electron and forms $Br^-$ ion.

The chemical formula for the given compound is $CaBr_2$