Respuesta :
Answer:
For 1: The correct answer is mass number.
For 2: The correct answer is protons and neutrons
For 3: The correct answer is there are three positively charged protons in the nucleus.
Explanation:
- For 1:
Atomic number is defined as the number of protons or electrons that are present in a neutral atom.
Atomic number = number of protons = number of electrons
Mass number is defined as the sum of number of protons and neutrons that are present in an atom.
Mass number = Number of protons + Number of neutrons
Atomic weight is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.
Atomic charge is defined as the number which arises when an atom looses or gains electrons
Hence, the correct answer is mass number.
- For 2:
There are 3 subatomic particles present in an atom. They are: protons, electrons and neutrons.
- Protons: They carry positive charger and are found in nucleus.
- Electrons: They carry negative charge and are found around the nucleus.
- Neutrons: They do not carry any charge and are found in nucleus.
Hence, the correct answer is protons and neutrons
- For 3:
A neutral atom contains equal number of protons and electrons.
We are given:
An atom carries a charge of -3. This means that 3 electrons are present in the atom
So, to neutralize it, we need 3 protons in the nucleus of an atom.
Hence, the correct answer is there are three positively charged protons in the nucleus.
