Answer true or false.
(a) The name of a binary ionic compound consists of the name of the positive ion followed by the name of the negative ion.
(b) In naming binary ionic compounds, it is necessary to state the number of each ion present in the compound.
(c) The formula of aluminum oxide is Al2 O3 .
(d) Both copper(II) oxide and cupric oxide are acceptable names for CuO.
(e) The systematic name for Fe2 O3 is iron(II) oxide.
(f) The systematic name for FeCO3 is iron carbonate.
(g) The systematic name for NaH2PO4 is sodium di- hydrogen phosphate.
(h) The systematic name for K2HPO4 is dipotassium hydrogen phosphate.
(i) The systematic name for Na2O is sodium oxide.
(j) The systematic name for PCl3 is potassium chloride.
(k) The formula of ammonium carbonate is NH4CO3.
39.
(a) A covalent bond is formed between two atoms whose difference in electronegativity is less than 1.9.
(b) If the difference in electronegativity between two atoms is zero (they have identical electronegativ- ities), then the two atoms will not form a covalent bond.
(c) A covalent bond formed by sharing two electrons is called a double bond.
(d) In the hydrogen molecule (H2), the shared pair of electrons completes the valence shell of each hydrogen.
(e) In the molecule CH4 , each hydrogen has an electron configuration like that of helium and carbon has an electron configuration like that of neon.
(f) In a polar covalent bond, the more electronegative atom has a partial negative charge (2) and the less electronegative atom has a partial positive charge (1).
(g) These bonds are arranged in order of increasing polarity CiH , NiH , OiH.
(h) These bonds are arranged in order of increasing polarity HiF , HiCl , HiBr. (
- i) A polar bond has a dipole with the negative end located at the more electronegative atom.
(j) In a single bond, two atoms share one pair of electrons; in a double bond, they share two pairs of electrons; and in a triple bond, they share three pairs of electrons.
(k) The Lewis structure for ethane, C2H6, must show eight valence electrons.
(l) The Lewis structure for formaldehyde, CH2 O, must show 12 valence electrons.
(m) The Lewis structure for the ammonium ion, NH4 1, must show nine valence electrons.
(n) Atoms of third-period elements can hold more than eight electrons in their valence shells.
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 2 images
