Molarity is a concentration unit, the number of moles of solute divided by the numbers of liters in a solution. Pertaining to chem
The fluid filled area between the pleural layers is called the pleural cavity.
Answer:
Proton - Positive charge
Neutron - No charge
Electron - negative charge
Explanation:
An atom is the smallest particle of matter that takes part in a chemical reaction.
It is made up of three fundamental subatomic particles.
- Protons are the positively charged particles in an atom.
- Neutrons do not carry any charges and are neutral
- Electrons are negatively charged
Both the protons and neutrons occupy a tiny center where the mass of the atom is concentrated. The region is called the nucleus.
A compound is a substance composed of 2 or more chemical elements.
The model does not represent a compound because it shows two atoms of the same element combined. To be a compound the model would need to contain atoms of different element, represented by different colored balls. Therefore, the picture does not represent a compound. :)
F---atomic number 9---1s2 2s2 2p5 -----7 electrons
