When the products of a reaction are hotter than the reactants, an exothermic reaction is happening. An exothermic reaction is a reaction that releases energy to the surroundings. The energy released should be more than what is absorbed in order to maintain the reaction.
Polar covalent are type of covalent bond ( sharing of electrons) in which the electrons shared by the atoms spend a greater amount of time, on the average closer to one atom's nucleus. An example of a compound that has a polar covalent bond is water (H2O). The electrons are unequally shared, with the oxygen atom spending more time with electrons than the hydrogen atoms. Since electrons spend more time with the oxygen atom, it carries a partial negative charge.
Answers:
1. Chemistry
2. Cold
3. Heat
4. Protons and neutrons
5. Positive
6. Neutral
7. True
8. Nucleus
9. Protons
10. Nobel gasses
11. Dmitri Mendeleev
12. the bottom of the square
13. True
14. Helium
Fajans' Rules are used to predict whether a chemical bond will be covalent or ionic.
<span>This depends on: </span>
<span>- the charge on the cation </span>
<span>- the size of the cation </span>
<span>- the size of the anion </span>
Answer:
sodium and potassium are kept in kerosene oil
Explanation:
hope this helps! :D