25
every third number add 10
14 / 24 / 34
5 / 15 / 25
18 / 28 / (38)
14 5 18 24 15 28 34
25 38 44 35 48 54
45 58 64 55 68 74
and so on ...
11
The mass number is equal to the sum of protons and neutrons in an atom. Since the element has 14 electrons and 15 neutrons, it must have 15 protons (atomic number is equal to number of protons). So, the mass number would be 15 + 15 = 30.
The mass number of an isotope is the sum of its protons and neutrons. Silicon has an atomic number of 14, meaning it has 14 protons. If the isotope has 15 neutrons, the mass number would be 14 protons + 15 neutrons, which equals 29. Therefore, the mass number of the silicon isotope is 29.
The mass number of an isotope is the sum of its protons and neutrons. Since silicon has 14 protons, the isotope with 15 neutrons would have a mass number of 14 (protons) + 15 (neutrons) = 29.
The number 15 is the cardinal number that is the sum of fourteen plus one. 15 is the number that is between 14 and 16.
times 2 plus 2 minus 1 repeated so it would be 15, 30, 32
-1
15 Because...+2 -1 x2 +2 -1 x2 +2 (-1)
The 2 numbers in a row are multiplied, then you subtract one and that's the next number in the sequence. EG, 2x2 = 4 4-1=3 2x3=6 6-1=5 3x5=15 15-1=14 number sequence is 2, 2, 3, 5, 14
13 is spelled as thirteen.14 is spelled as fourteen.Did you mean the number 1314? This would be spelled as one thousand, three hundred and fourteen.
It does not, the mass number of nitrogen is 14 not 15.
14. 15 would be rounded to 20.