elements are made up of one type of atom and compounds are made up of multiple atoms bonded together. Knowing this, how do we classify oxygen gas, which exists as O2?

5) Which of the following gases exists as a diatomic molecule? A) krypton C) hydrogen B) argon 6) Which statement is correct about chlorine-35 and chorine-37 ? A) They have a different number of protons and electrons, but the same number of neutrons. B) They have the same number of protons and electrons, but a different number of neutrons. C) They have the same number of protons, but a different number of electrons and neutrons 7) Using the periodic table, what is the atomic number of argon? A) 18 B) 39.95 C) 13 8) What kind of formular is C,H,0, consider as? A) Empirical formula C) Confensed formua B) Moleculr formula 9) Who provided evidence for the existence of a nucleus in an atom? A) John Dalton C) Ernest Rutherford B) J.J. Thomson 10) Which statement about subatomic particles is NOT true? A) Protons and neutrons have the same charge B) Protons and neutrons have almost the same mass C) Protons and electrons have opposite charges 11) To calculate the number of neutrons in an atom,…

A combustion reaction involves the reaction of a substance with oxygen gas. The complete combustion of any hydrocarbon (binary compound of carbon and hydrogen) produces carbon dioxide and water as the only products. Heptane is a hydrocarbon that is found in gasoline. Complete combustion of heptane produces 7 liters of carbon dioxide for every 8 liters of water vapor (both measured at the same temperature and pressure). What is the ratio of carbon atoms to hydrogen atoms in a molecule of heptane?

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The figure shown below shows the structure of cytidine, one of the essential components of RNA. Write the correct molecular formula for the compound. (Enter the elements in the order: C, H, N, O).

A pure substance has been isolated in the laboratory. Based on the two characteristics below, how can the substance be classified? 1. The species can not be separated by physical means. II. The species can be separated by chemical means. a compound O a heterogeneous mixture O a homogeneous mixture an element

Which of the following elements is diatomic? Magnesium, Hydrogen, Calcium, Bromine, Iodine, Fluorine, Nitrogen.

Read: An Ion is a charged atom, # protons ≠ # electrons. On page three, paragraph one states, “The prefix poly- means many and atomic refers to atoms, so a polyatomic ion is an ion that contains more than one atom. This differentiates polyatomic ions from monatomic ions, which contain only one atom.” Ions that contain only one atom are called monoatomic ions. Ions that contain more than one atom are called polyatomic ions. A monatomic ion is a single charged atom, with the number of protons not equal to the number of electrons. A polyatomic ion is a group of covalently-bonded atoms, with the total number of protons not equal to the total number of electrons. Using the image attached how could you further elaborate this answer? Cite evidence from the image.

I'm having some trouble on my homework and could really use some help See attached:

Give the chemical name for the ionic element/compound. Your answer will be marked incorrect if you did not spelled the element's name correctly. Mg2+ p3. NO3 Fe2+ HCO3 Ag* Be2+ C2H3O2 or CH3COO