Answer:
The number of electron in neutral atom of nitrogen are 7.
Atomic mass = 14 amu
Explanation:
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
The number of electron in neutral atom of nitrogen are 7.
Thus its atomic number is also 7.
Atomic mass = number of proton + number of neutron
Atomic mass = 7 + 7
Atomic mass = 14 amu
Answer:
Explanation:
The unbalanced nuclear equation is
It is convenient to replace the question mark by an atomic symbol, , where x = the atomic number, y = the mass number, and Z = the symbol of the element .
Then your equation becomes
The main point to remember in balancing nuclear equations is that **the sums of the superscripts and the subscripts must be the same on each side of the equation**.
Then
84 = x + 2, so x = 84 - 2 = 82
210 = y + 4, so y = 206
Element 82 is lead, so the nuclear equation becomes
Answer:
6+9=15
mass number =15
mass number = no. protons + no. of neutrons
D is a scintillation counter.