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If an atom has an atomic number of 15 and an atomic mass of 31, how many protons, neutrons and electrons does the atom contain?
The for any element is the number of protons in its atomic nuclei. In a neutral atom, the number of electrons are the same as the number of protons. The...
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If you build an atom using two protons, two neutrons, and two electrons, two electrons what have you built an atom of?
The number of protons is crucial in detemining the identity of the atom (or element). If the atom contains 2 protons, 2 positively charged nuclear particles, then $Z=2$, and the...
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An atom of nitrogen has seven protons in its nucleus. How many electrons does it have?
And thus if it has 7 protons, 7 fundamental, massive, positively charged particles in its nucleus, neutrality demands 7 fundamental, negatively charged particles, whizzing about the nucleus. What do we...
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The mass of an atom may be determined by adding the masses of the protons and neutrons in the nucleus and then subtracting the mass defect. Why is it unnecessary to include the electrons when determining the mass of an atom?
A proton has has about 1836 times more mass than an electron and neutrons are almost the same mass as protons.
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Aluminum has an atomic number of 13. How many protons does an atom of aluminum have? How many electrons does it have?
Aluminum has (by definition) 13 protons, 13 positively charged particles. Because aluminum is neutral (as is all matter), it therefore has 13 negatively charged particles, electrons. Aluminum has an of...
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A carbon-12 atom has 6 protons, 6 neutrons, and 6 electrons. How many protons does a carbon-14 atom have?
carbon-12 and carbon-14 are of the same element, carbon. this means that they have the same number of protons and the same number of electrons - just different numbers of...
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$"Atom W has 9 protons and 9 neutrons, Atom X has 8 protons and 9"$ $"neutrons. Atom Y has 9 protons, and 9 neutrons. Atom Z has 10 protons"$
$"and 10 neutrons."$
What are the isotopes?
And $Z$ defines the identity of the element: $Z=1,H;Z=2,He;..........Z=6,C;........Z=37, Ru...........$ You don't have to remember these numbers, because a Periodic Table will be supplied to you in every test of...
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A lithium atom has positively charged protons and negatively charged electrons. The sum of the charges represents the charge of the lithium atom. How do you find the charge of the atom?
For the lithium atom, $Z=3$; there are 3 positive, nuclear charges. There are 3 extra-nuclear electronic charges, i.e. borne by the 3 electrons, in the neutral atom. Lithium generally loses...
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An atom has 35 protons, 38 neutrons, and 35 electrons. What is the charge of the atom's nucleus?
The nucleus has a positive charge. The electron orbit has a negative charge. These two values are equal (35), giving the atom an overall charge of "neutral". Hope this helps...
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Sally is making a model of a Mg atom with an atomic mass number of 24. She has balls for the protons, neutrons, and electrons. She has added 6 neutrons to her model. How many more neutrons does she need to add to complete her neutral atom of magnesium?
$Z$, $"the atomic number"$ of magnesium is 12. This means that there are 12 positively charged nuclear particles. This defines the particle as a magnesium atom. To represent the $""^24Mg$...
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