Answer:
Answer in explanation
Explanation:
a. Boron , element 5
Helium has 2 electrons, add to the other 3 to give 5.
Other group members are : Aluminum Al, Gallium Ga, Indium In , Thallium Tl and Nihonium Nh
b. Sulphur, element 16
Neon is 10 , add other 6 electrons to make 16
Other group members are: Oxygen O, selenium Se , Tellurium Te and Polonium Po
c. Lanthanum, element 57
Xenon is 54, add the other 3 electrons to give 57.
Other elements in group : Scandium Sc , Yttrium Y , Actinium Ac, Lutetium Lu and/or Lawrencium Lr
Your answer would be C. Alpha decay involves the ejection of 2 protons and 2 neutrons from the nucleus for a total of 4 amu lost. This form of decay is most common in heavy elements.
Answer:
Gram molecular mass = 40 + (35.5)2 = 111g
Mass of
in 1 mole = 111g
Mass of
in 0.15 mole = 111 × 0.15 = 16.65 g
A chemical reaction involves an interaction between two or more species to yield a product.
<h3>
What is a chemical reaction?</h3>
A chemical reaction involves an interaction between two or more species to yield a product.
The following is the classification of the reactions based on type;
- The first reaction shown in the attachment is a condensation reaction
- The second reaction is an addition reaction
- The third reaction is an elimination reaction
- The fourth reaction is a substitution reaction
Learn more about reaction:brainly.com/question/9524025
#SPJ1