The atomic number for the element calcium (Ca) is 20. How many protons and electrons does each atom have?

If ##Z##, the ##=## ##20##, there MUST be 20 nuclear protons, and the element MUST be calcium, with 20 electrons associated with it.

By definition, the atomic number is the number of protons, massive, positively charged nuclear particles. If there are 20 positively charged nuclear particles, there MUST be 20 fundamental, negatively charged particles also associated with the ATOM. And there are; they are called ELECTRONS, which are conceived to orbit the nuclear core.

How do I know that there are such electrons? Well, because calcium, like all matter, is electrically neutral. For every positive charge, there is a negative charge. The mass of a single calcium atom is ##”40 atomic mass units”##. Since, electrons have negligible mass, the difference in and atomic number can be accounted for the presence of another 20 or so neutrons, massive, neutrally charged nuclear particles.

Because an element can have varying numbers of neutrons, the identity of the element always depends on ##Z##, the atomic number, a slight excess or deficiency of neutrons can give rise to the existence of . The weighted average of the isotopes gives rise to the quoted atomic mass on .

Calculate your essay price
(550 words)

Approximate price: $

Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)
Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more