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An atoms is composed of a central NUCLEUS, with ELECTRONS occupying shells, moving around the nucleus.

The nucleus is composed of PROTONS and NEUTRONS.

The PROTON...

Electron volts, like joules, are a unit of energy. This may sound confusing- why two? But think of it this way; length has two possible units- metric (metres) and imperial (inches). We can use either unit...

z = 3x + 5y 41 = 3(7) +5y 41= 21 + 5y 20 = 5y 4 = y y = 4 2y = 8

Answer First a wire loop is cleaned with diluted hydrochloric acid, which is then dipped into the sample metal or solution. This is then held over an open flame and the colour emitted is ...

When we have a quadratic (ax² + bx + c = 0) we can "complete the square" to solve for x. For example x² + 8x + 7 = 0. First look at the x² + 8x, in particular th...