The proton is the positively charged sub-atomic particle in the nucleus of an atom and the electron is the negatively charged P for positive.
Answer:
1, 2, 3
Explanation:
Using a simple chemical reaction as an example;
2H2 + O2 --> 2H2O
1) number of atoms
In the reactant side (left side of the reaction), there are 4 Hydrogen atoms which is equal with the number of atoms in the product (right side of the reaction). In the reactant side, there are 2 oxygen atoms, same thing with the product side. This means it is conserved.
2) Number of electrons
The number of electrons are also balanced. Although there is sharing of electrons, This means it is conserved.
3) In a chemical reaction, the law of conservation of matter is obeyed. Since the number of atoms is conserved, the mass is also conserved.
4) numbers of molecules
Although this is true for some reactions, it is not always the case as seen in the reaction above. This means it is not conserved.
<h3>
Answer:</h3>
55.81%
<h3>
Explanation:</h3>
Mass percentage composition of an element in a compound can be calculated by dividing the mass of the element in the compound by the relative formula mass of the compound and expressing it as a percentage.
Therefore;
% composition = (Mass of the element/ relative formula mass)100%
In this case;
We are given the mass of the element (oxygen) and the mass of the compound (Kaolinite) thus;
Mass % of oxygen in kaolinite = (Mass of oxygen/ mass of Kaolinite)100%
% composition of Oxygen = (8.009 g/14.35 g)100%
= 55.81 %
Therefore; the mass percent of oxygen in Kaolinite is 55.81%
Answer: repair and renew wounds effectively
~replacing lost cells, such as a shed skin cell
~allows for growth
~allows for reproduction
Explanation:
The cell cycle includes the various events in which a cell matures by increasing length and shape, cell replicates its genome and prepare itself for cell division.
The cells divide and replace the old and damaged cells in the multicellular organisms. Multicellular organisms are those organisms which have more than one cell.
This also helps in replacing the lost cells and helps in removing the shedding the skin cell.
This process is also useful for cellular growth and reproduction.