II 9
What is the atomic number of an ion with 4 protons, 5 neutrons and a charge of 2+?
14
II 9
III) 5
IV) 7
because:
V) atomic number is equal to the total number of protons.
VI) atomic number is equal to the total number of neutrons.
VII) atomic number is equal to the total number of protons plus neutrons.
VIII) atomic number is equal to the total number of protons plus electrons.
Answers: 2
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Imagine if during the cathode ray experiment, the size of the particles of the ray was the same as the size of the atom forming the cathode. which other model or scientific observation would have also been supported? 1. this would support dalton's postulates that proposed the atoms are indivisible because no small particles are involved. 2. this would support bohr's prediction about electrons moving in orbits having specific energy. 3. this would support bohr's prediction about electrons being randomly scattered around the nucleus in the atom. 4. this would support dalton's postulates that proposed that atoms combine in fixed whole number ratios to form compounds.
Answers: 1
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An alpha particle is: a hydrogen atom a nucleus of helium two neutrons an electron
Answers: 1
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When a chemist collects hydrogen gas over water, she ends up with a mixture of hydrogen and water vapor in her collecting bottle if the pressure in the collecting bottle is 97.1 kilopascals and the vapor pressure of the water is 3 2 kilopascals, what is the partial pressure of the hydrogen?
Answers: 1
What is the atomic number of an ion with 4 protons, 5 neutrons and a charge of 2+?
14
II 9
II 9
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