Biology

Biology, 02.07.2019 15:00, Kathryn014

Acertain atom has an atomic number of four. how many protons does it have? a. 2 b. 0 c. 8 d. 4

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Biology, 10.07.2019 11:00, only1123

Joan and mike's teacher show them a picture of an atom and ask them to identify it using the periodic table. joan says the atom is carbon, but mike says it is lithium. who is right and why? question 3 options: mike is right because the atomic mass of lithium is 6. there are 3 protons and 3 electrons in the atom. 3+3=6 joan is right because the atomic number of carbon is 6. there are 3 protons and 3 electrons in the atom. the atomic number shows the number of protons plus the number of electrons. 3+3=6 joan is correct because carbon is a neutral atom. there are the same number of protons and electrons in the atom pictured. mike is correct because the atomic number shows the number of protons in all atoms. there are 3 protons and the atomic number of lithium is 3. save

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Physics, 21.08.2019 19:20, damientran

Acertain atom has atomic number z = 25 and atomic mass number a = 52. a. what is the approximate radius of the nucleus of this atom? rnucleus = m b. what is the magnitude of the electrostatic force of repulsion between two protons on opposite sides of the diameter of the nucleus. f= n

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Chemistry, 29.08.2019 19:30, pinapunapula

Which of the following statements are correct? rewrite the incorrect statements to correct them. a) the atomic number always equals the number of protons. b) the atomic mass can be smaller that the atomic number. c) the mass number of an atom can be equal to the atomic number. d) the number of protons always equals he number of neutrons in an atom. e) the number of protons always equals the number of electrons in an atom. f) if the number of protons in an atom were changed, it would be a different element.

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Biology, 23.09.2019 19:00, sheila101

Acertain atom of oxygen contains 8 protons, 8 neutrons, and 8 electrons. another atom of unknown identity contains 9 protons. which of the following must be true about this unidentified atom? a. it is an isotope of oxygen b. its atomic mass is a decimal number c. it has 9 neutrons in its nucleus d. it cannot be an atom of oxygen

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Acertain atom has an atomic number of four. how many protons does it have? a. 2 b. 0 c. 8 d. 4...

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