If we have a sample of silicon (Si) atoms that has 14 protons, 14 electrons, and 18 neutrons What is the name of this specific silicon isotope?
One isotope of sodium has 11 protons and 7 neutrons. What is the mass number of this isotope?
One way in which elements differ from each other is the structure of the electron cloud in each element’s atoms. In an electron cloud, an electron that is farther away from the nucleus has
Which are different forms of an element that have different numbers of neutrons?
What can be added to an atom to cause a nonvalence electron in the atom to temporarily become a valence electron?
Scientists are working with a liquid that is made of only one type of atom. Which statement correctly describes this liquid?
Uranium is an element that is often used in nuclear power plants. Uranium atoms are very large, and the substance can be dangerous if it is not carefully contained. What is true about all uranium atoms?
The chemical symbol for the element calcium is Ca What would be the symbol representing calcium atoms that have lost two electrons?
A potassium atom (atomic number 19) loses an electron while forming a bond with another atom. Which best describes the potassium ion that forms?
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