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Explain the significance of atomic number and mass number in determining atomic properties. Which of these changes in isotopes?

Atomic Number: Number of Protons in the nucleus of the atom, also equal to the number of electrons in a neutral atom. Mass Number: Total number of "nucleons" (Protons and Neutrons) in the nucleus I...
JT
Answered by Joshua T. • Chemistry tutor
13842 Views

Should you structure your argument in an essay by writing one side and then the other, or write it paragraph by paragraph?

Both of these are acceptable, but I would advise writing it paragraph by paragraph, as quite often students run out of time in the exam and that way at least you've covered both sides of the argument. It als...
SB
6981 Views

solve the simultaneous equations , 5a+2b=23 & 9a-2b=19, algebraically.

find sum of both equations: 14a=42, therefore a=3, substitute 'a' into an equation: (5x3)+2b=23, therefore 2b=8, therfore b=4
RP
Answered by Rohan P. • Maths tutor
5050 Views

find f'(x) of (x^2) + 3x + 2.

2x + 3
RP
Answered by Rohan P. • Maths tutor
4223 Views

state three differences between a plant cell and animal cell.

any three from: no cell wall in animal cells/ (cellulose) cell wall in plant cell centrioles present in animal cell, not in present in plant cell (permanent) vacuole in plant cell, lack of (permanent) vacuol...
RP
Answered by Rohan P. • Biology tutor
11580 Views