A response that is chemical in nature and is characterized with the aid of the release of power in the shape of warmth or light is referred to as an exothermic response.
Following processes are exothermic:-
freezing of water.
digestion of food.
a person running.
heating with a furnace.
Following processes are endothermic:-
boiling of water.
a person growing.
wood being chopped.
Endothermic reactions are chemical reactions wherein the reactants soak up warmness electricity from the environment to shape products. those reactions decrease the temperature of their surrounding place, thereby growing a cooling impact.
DISCLAIMER:- Your question is incomplete , see full question below:-
Classify the following processes as exothermic or endothermic:
(a) freezing of water.
(b) boiling of water.
(c) digestion of food.
(d) a person running.
(e) a person growing.
(f) wood being chopped.
(g) heating with a furnace.
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Answer: a) 
b) 
c) 
Explanation:
Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom.
The electrons are filled according to Afbau's rule in order of increasing energies and thus the electronic configuration:
a)
b)
c)
<h3><u>Answer;</u></h3>
F, Br, l
<h3><u>Explanation;</u></h3>
- Astatine is a member of the halogen family, elements in Group 17 (VIIA) of the periodic table.
- It is a highly radioactive element and it is the heaviest known halogen. Astatine is similar to the elements above it in Group 17 (VIIA) of the periodic table, especially iodine.
-
One property of iodine is that it tends to collect in the thyroid gland
.
