14 SEP Develop Models Each helium atom has two protons. Sketch models of helium- 3 and helium-4, which have approximate masses of 3 amu and 4 amu, respectively.
Label and differentiate protons, neutrons, and electrons in your models.
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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

Which of the following statements is true? an atom consists of protons, electrons, and neutrons.an atom consists of protons and neutrons.an atom consists of electrons bonded to one another.an atom consists of protons bonded to one another.

Give 2 characteristics of low mass stars