<u>Answer</u>: Ionic bond
<u>Explanation</u>:
- An ionic bond is a type of a chemical bond formed by the complete transfer of electrons from one atom to another atom i.e one of the atoms loses its electrons and the other gains it. This results in the formation of 2 oppositely charged ions.
- In sodium chloride, sodium loses one electron from its outermost shell (valence shell) whereas chloride gains it. Due to this sodium gains, a net positive charge and chloride gain a net negative charge.
- So, due to the complete transfer of electrons that takes place from sodium to chloride, the compound generated (Sodium chloride) has an ionic bond.
40 individuals emigrate, 0 individuals die, 10 individuals are born, 28 individuals immigrate would result in decrease in population showing negative population growth.
Explanation:
Negtaive population growth is a term used when individuals leaving the population is more than new individuals in the population.
Individuals would leave the population by two means:
either they die or emigrate from other places to join in.
The following scenario will be analysed by the formula provided to know the negative growth in population:
population growth = (birth rate + immigration) - (death rate + emigration)
putting the values in the equation:
first case:
immigrated individual = 14
emigrants = 0
new born = 14
died = 14
population growth = (14+14)-(14-0)= 14
second case:
immigrants = 28
emigrants = 40
new born = 10
died = 0
population growth= (10+28)-(0+40)= - 2
third case:
immigrants = 0
emigrants = 12
new born = 17
died = 5
population growth = (17 +0)-(5+12) = 0
fourth case:
immigrants = 0
emigrants = 19
new born = 25
died = 4
population growth:(25+0) - (19+4) =3
In second case the population growth has become negative. The value of population growth is -2.
Answer:
Ionization energy tend to increase from left to right across a period on the periodic table.
Explanation:
Ionization energy can be defined as the minimum energy required to remove or detach an electron from a neutral atom in a gaseous state.
Generally, ionization energy tend to increase from left to right across a period on the periodic table. This increase is due to the fact that the atomic radius of chemical elements generally decreases across the periodic table, typically from alkali metals (group one elements such as hydrogen, lithium and sodium) to noble gases (group eight elements such as argon, helium and neon) i.e from left to the right of the periodic table. Also, the atomic radius of a chemical element increases down each group of the periodic table, typically from top to bottom (column).
This ultimately implies that, atoms with relatively large atomic radii tend to have a low electron affinity and a low ionization energy.
If plants were to be removed, then the whole world will become a disaster. For one, nitrogen cannot be used and released for intake in other animals.