Imagine we combine the substances shown to the right: 8. Which of the following products is likely to form? a) b) OH CH₂ONa -O Na* c) d) HINT: Na+ is a cation (CH3O¯ is an anion) a C

The atomic number of sulfur is 16. Sulfur combines withhydrogen by covalent bonding to form a compound, hydrogensulfide. Based on the number of valence electrons in a sulfuratom, predict the molecular formula of the compound.(A) HS(B) HS2(C) H2S(D) H4S

Predict which of these compounds are ionic and which are covalent.(A) Ca3N2(B) Li2CO3(C) PCl5(D) NaOH(E) CH4(F) MgO

2. Draw the Lewis structures for each of the following ions or molecules. Give the number of electrons in each species. Remember to enclose ions in square brackets with the charge as a superscript outside the right bracket. (a) Br 20 (c) BrF 3 (e) PCI 4* (b) IOF 3 (I is the central atom) (d) ASF 3

3. Using electronegativity difference, indicate the type of bond between the following atoms: (a) Li-Cl(b) C-Br(c) F-Cl(d) Br-Br

1.Draw the electronic diagrams for the following compounds (showing outermost shell   electrons only). (a) A compound formed from calcium and sulphur (b) a compound formed from aluminium and oxygen (c) A compound formed from nitrogen and chlorine (d) carbon dioxide

Which of the following compounds has both ionic and covalent bond? (a) H2O (b) NH4Cl (c) NaCl (d) HCl

Name each ionic compound. In each of these compounds, the metal forms more than one type of ion.(a)SnCl4(b)CuI2(c)Fe2O3(d)HgBr2

Assign partial charges (8+ or 8-) to each atom indicated by an arrow. If an atom has no partial charge indicate this by writing 'no charge' by the appropriate arrow. :CI: 0: O: + :NEC -N-H H H H H H (a) (b) (d) (e) (f)

N Calculate the lattice enthalpy for RbCl. You will need the following information: Species A,H, kJ/mol Rb(e) RbCl() CI(g) Enthalpy of ionization for Rb(g) is 403.0 kl/mol; electron attachment enthalpy for Cl(g) is-349.0 kJ/mol Lattice enthalpy kJ/mol Submit Answer *** 1 43 E D 80.9 -435.4 121.3 Try Another Version 80 54 R F di a 25 2 item attempts remaining T G ‹6 P FA Y & 29 7 H 8 #7 U 8 Dil FA - 6 8 K