To predict: The molecular formula of the compound hydrogen sulfide.
Introduction: Every element hasthe smallest unit of matter that retains the properties of an element. This smallest unit is called an atom. There are three subatomic particles of an atom. These are electrons, protons, and neutrons. Protons and neutrons are present in the central part of an atom called the nucleus. Electrons revolve around nucleus in different electronic shells. The electrons present in the outermost shell are called as valence electrons. The valence electron takes part in
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- What atom has only one proton? a. hydrogen c. a free radical b. an isotope d. a radioisotopearrow_forwardWhich statement is false? A. Elements are found in compounds and molecules B. compounds are made of elements C. a molecule must be made of at least two atoms D. chemical bonds form between molecules of solute and solvent E. two atoms of oxygen make a molecule of oxygenarrow_forwardA covalent bond forms whena. electrons are present in a valence shell.b. a valence electron is removed from one atom and added to another.c. a pair of valence electrons is shared between two atoms.d. the electronegativity of one atom is much greater than that ofanother atom.arrow_forward
- Which of the following statements about chemicalbonds is true?a. Covalent bonds are stronger than ionic bonds.b. Hydrogen bonds occur between two atoms ofhydrogen.c. Bonding readily occurs between nonpolar andpolar molecules.d. A molecule of water is unlikely to bond with anion.arrow_forwardWater molecules have one oxygen atom that is more electronegative than the two hydrogen atoms bound to it. As a result, which type of bonding hold water molecules together a. non-popular covalent bonding b. polar covalent bonding c.ionic bonding d.hydriohocicarrow_forwardThe atomic number of sulfur is 16, Sulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. Based on the number of valence electrons in a sulfur atom, predict the molecular formula of the compound. a. HS b. HS2 c.H2S d. H3S2arrow_forward
- Choose the best answer for following question. An atom that has two electrons in the valence shell, such asmagnesium, would most likelya. share to acquire a completed outer shell.b. lose these two electrons and become a negatively charged ion.c. lose these two electrons and become a positively charged ion.d. bind with carbon by way of hydrogen bonds.e. bind with another magnesium atom to satisfy its energy needs.arrow_forwardThe element phosphorus is needed in organisms to builda. proteins.b. carbohydrates.c. ATP.d. steroidsarrow_forward11H and 13H have (a) different chemical properties because they have different atomic numbers (b) the same chemical properties because they have the same number of valence electrons (c) different chemical properties because they differ in their number of protons and electrons (d) the samechemical properties because they have the same atomic mass (e) the same chemical properties because they have the same number of protons, electrons, and neutronsarrow_forward
- Oxygen has 8 protons, 8 neutrons, and 8 electrons. What is its atomic mass?(a) 8 (b) 16 (c) 24 (d) 32.arrow_forwardIodine has 37 known isotopes. Therefore, the atomic mass has a range of 108-144 amu. Which of the following statements concerning iodine is correct? A) The isotopes of iodine have between 55 and 91 protons. B) An atom of iodine can have between 55 and 91 neutrons. C) The isotopes of iodine will always have the same number of neutrons, but the protons can vary. D) The isotopes of iodine have between 108 and 144 neutrons, but the number of protons will not vary.arrow_forwardCompared with 31P, the radioactive isotope 32P has(A) a different atomic number.(B) one more proton.(C) one more electron.(D) one more neutron.arrow_forward
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