Chemistry Homework Help

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Subatomic Particles

Q. Which one of the following statements is not true? A) Nucleons are held together in a nuclide by an electromagnetic force B) Oxygen-15 is unstable because it has too few neutrons. C) All nuclides with Z > 83 are unstable and ultimately decay into more stable nuclides with smaller Z values D) As the atomic number increases, the ratio of neutrons to protons in a nuclide generally increases E) Generally, the number of neutrons in a nuclide nearly equals the number of protons when the atomic number is small (Z < 18).

Solved • Feb 19, 2020

Subatomic Particles

Q. How many protons does the S^2- ion possess? a) 8 b) 18 c) 14 d) 4 e) 16

Solved • Feb 18, 2020

Subatomic Particles

Q. Write the symbol for 12849X.

Solved • Feb 12, 2020

Subatomic Particles

Q. 8. Calculate the number of protons in 231.3 g of tungsten.

Solved • Feb 11, 2020

Subatomic Particles

Q. After an atom has lost an electron it becomes a/an ______ and has a _____ charge. A. anion, positive B. cation, positive C. anion, negative D. cation, negative E. nucleus, positive

Solved • Feb 11, 2020

Subatomic Particles

Q. Write the chemical symbols for three different atoms or atomic cations with 3 electrons.

Solved • Feb 10, 2020

Subatomic Particles

Q. Write the chemical symbols for three different atoms or atomic anions with 36 electrons.

Solved • Feb 10, 2020