Chemistry

Chemistry, 14.07.2019 11:40, nana55959

The atomic number of an atom is always equal to the number of its what ? ? protons, only neutrons , only protons plus neutrons protons plus electrons

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Biology, 07.07.2019 11:30, travashouston4873

1)if a boron atom has 5 protons, 6 neutrons, and 5 electrons, it has a mass of a)11 b)10 c)6 2)the atomic number of an atom is the total number of in the nucleus. a)protons and electrons b)protons c)neutrons 3)a lithium atom has 3 protons, 3 neutrons, and 3 electrons. which of the following sets of particles represents and isotope of this atom? a)4 protons, 3 neutrons, and 4 electrons b)3 protons, 4 neutrons, and 3 electrons c)4 protons, 4 neutrons, and 4 electrons

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Chemistry, 25.07.2019 08:40, aa985960

Which of the following is correct concerning subatomic particles? a) the electron was discovered by goldstein in 1886. b) the neutron was discovered by chadwick in 1932. c) the proton was discovered by thomson in 1880. d) cathode rays were found to be made of protons. how many neutrons and protons does a neutral atom of sodium with an atomic mass number of 23 have? a) 22 neutrons; 11 protons b) 23 neutrons; 11 protons c) 11 neutrons; 11 protons d) 12 neutrons; 11 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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