Which of these descries bromine's (Br) location on the periodic table? O Group 7A, Period 4
O Group 4, Period 7A
O Group 3A, Period 2
O Group 2, Period 3A

O Group 7A, Period 4

Explanation:

To find the location of bromine on the periodic table, we must known its period and group on the periodic table.

Bromine is made up of 35 electrons.

 Its electronic configuration is:

         1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵

From this configuration, the number of energy levels here is 4 so the element bromine is in period 5

Since the number of valence electrons is 7, it belongs to group 7

So, period 4 and group 7 is the right choice

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.