Chemistry
Chemistry, 18.07.2019 04:30, joseandpauline

Potassium has a mass number of 40 and an atomic number of 19. how many protons does it have?

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Chemistry, 22.09.2019 09:00, annie8348
Which option describes a similarity and a difference between isotopes of an element? a) same atomic number; different number of protons b) same number of protons; different atomic number c) same atomic number; different mass number d) same mass number; different atomic number e) same number of neutrons; same number of protons
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Physics, 02.10.2019 11:00, krocker58
1. what information does the atomic mass of an element provide? a.the sum of electrons and protons in atom b.the difference between the number of protons an electrons c.the numbers of isotopes d.the number of protons and neutrons in a item 2.how do scientist determine the number of neutrons in an item? a.they find the number of protons b.they add the umber of electrons to protons c.they divide the atomic mass of two d.they subtract the atomic number from the atomic mass 3.how many protons are in a element with an atomic number of 8 and a mass number of 18? a.8 b.18 c.10 d.3 4.two atoms are that are isotopes of one number must have the same number as what? a.neutrons b.atomic mass c.protons d.all particles 5.the modern periodic table is organized by number? a.developing b.decreasing c.reducing d.increasing if all questions are answers correctly i will be giving out a huge prize to that person so they could get pro and receive 500 points -your friend queen
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Potassium has a mass number of 40 and an atomic number of 19. how many protons does it have?...

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