Question

3. If 2a - 3b = 1 and 5a + 2b = 50, then what is the
value of a - b?
(a) 10
(b) 6
(c) 7
(d) 3​

Answer 1

Step-by-step explanation:

ihhjggThe atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus.