Chemistry, 02.09.2019 15:10 kadinmorgan
When the nucleus of an atom contains a constant number of protons but a variable number of neutrons, the atom is called a(n)?
Answers: 1
Chemistry, 22.06.2019 17:30, rollercoasterbuddies
Why is the melting of ice a physical change ?
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Chemistry, 23.06.2019 07:00, jboii11
An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample? a. naphthalene, a molecular solid with the formula c10h8 b. silica, a network solid held together by covalent bonds with the formula sio2 c. calcium chloride, an ionic compound with the formula cacl2 d. water, an molecular compound with the formula h2o
Answers: 2
When the nucleus of an atom contains a constant number of protons but a variable number of neutrons,...
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