Number = 42
50% of 42
= 50/100 × 42
= 21
Increased number = 42 + 21 = 63
Answer: 5
a
+
2
b
+
9
Step-by-step explanation: Hope this helped!!!!
Answer:
Barium, Strontium and Beryllium
Explanation:
There are 18 groups in the periodic table and the previous 3 all belong to the same group, group 2 the alkali metals
Silicon is group 14, the carbon group
Aluminum is in the boron group, group 13
Osminium is in the group 8 transition metals
