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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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An element has 43 protons and 50 neutrons. What is the atomic number of this element?
is given by number of protons in the nucleus..
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Element X has two isotopes. X-15 has 7 protons and 8 neutrons. What is the atomic number and mass number of the second isotope, which has 10 neutrons in its nucleus?
The most important thing to keep in mind here is that are atoms that have the same number of protons inside their nuclei. In other words, an isotope...
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Boron has two isotopes, boron-10 and boron-11. Boron-10 has five protons and five neutrons. How many protons and neutrons does boron-11 have? Explain.
are given by the name of the element and the . Here boron-11 means the name of the element is boron and the mass number is 11. We are...
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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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If an atom has an atomic number of 9 and an atomic mass number of 19, how many protons, neutrons, and electrons does it have?
The is the number of protons $("p"^+")$. In a neutral atom, the number of electrons $("e"^(-)")$ equals the number of protons. is the sum of the protons and neutrons $("n"^0")$...
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An element has 43 protons and 50 neutrons. What is the atomic mass of this element?
The (the number above the letters) is protons + neutrons. The , or the proton number is the number of protons.
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All the atoms of a particle element have an equal number of protons and neutrons (Z=N). Which one is true?
A) The atomic weight must be a whole number.
B) The mass number must be exactly twice the atomic number for each atom.
The answer is B) The must be exactly twice the for each atom. The number of protons is the atomic number of an element. The mass number is the sum...
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How many protons, electrons, and neutrons does a neutral atom of an element with atomic number 48 and mass number 120 contain?
The mass of an atom is the sum of massive nuclear particles, protons (as above), and neutrons, neutrally charged, massive nuclear particles. Here the number of neutrons $=$ $120-48=?$ In...
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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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