An illustration shows the periodic table of elements.
The elements in the periodic table are arranged in groups (columns numbered Roman numeral 1 through 18) and periods (rows numbered 1 through 7) such that the atomic number increases along a period from left to right. The elements are divided into the following categories: • Alkali metals • Alkaline earth metals • Transition metals • Post-transition metals • Lanthanoids • Actinoids • Metalloids • Nonmetals • Noble gases • Unknown The elements are also classified on the basis of their physical states at room temperature as follows: • Solid • Liquid • Gas • Unknown The element hydrogen is enlarged with the following properties highlighted. • Chemical symbol: H • Name: Hydrogen • Atomic Number: 1 • Atomic weight: 1.008 Listed by atomic number, symbol, and name. 1, H, Hydrogen. 2, H e, Helium. 3, L i, Lithium. 4, B e, Beryllium. 5, B, Boron. 6, C, Carbon. 7, N, Nitrogen. 8, O, Oxygen. 9, F, Fluorine. 10, N e, Neon. 11, Na, Sodium. 12, M g, Magnesium. 13, A l, Aluminum. 14, S i, Silicon. 15, P, Phosphorus. 16, S, Sulfur. 17, C l, Chlorine. 18, A r, Argon. 19, K, Potassium. 20, C a, Calcium. 21, S c, Scandium. 22, T i, Titanium. 23, V, Vanadium. 24, C r, Chromium. 25, M n, Manganese. 26, F e, Iron. 27, C o, Cobalt. 28, N i, Nickel. 29, C u, Copper. 30, Z n, Zinc. 31, G a, Gallium. 32, G e, Germanium. 33, A s, Arsenic. 34, S e, Selenium. 35, B r, Bromine. 36, K r, Krypton. 37, R b, Rubidium. 38, S r, Strontium. 39, Y, Yttrium. 40, Z r, Zirconium. 41, N b, Niobium. 42, M o, Molybdenum. 43, T c, Technetium. 44, R u, Ruthenium. 45, R h, Rhodium. 46, P d, Palladium. 47, A g, Silver. 48, C d, Cadmium. 49, I n, Indium. 50, S n, Tin. 51, S b, Antimony. 52, T e, Tellurium. 53, I, Iodine. 54, X e, Xenon. 55, C s, Cesium. 56, B a, Barium. 57, L a, Lanthanum. 58, C e, Cerium. 59, P r, Praseodymium. 60, N d, Neodymium. 61, P m, Promethium. 62, S m, Samarium. 63, E u, Europium. 64, G d, Gadolinium. 65, T b, Terbium. 66, D y, Dysprosium. 67, H o, Holmium. 68, E r, Erbium. 69, T m, Thulium. 70, Y b, Ytterbium. 71, L u, Lutetium. 72, H f, Hafnium. 73, T a, Tantalum. 74, W, Tungsten. 75, R e, Rhenium. 76, O s, Osmium. 77, I r, Iridium. 78, P t, Platinum. 79, A u, Gold. 80, H g, Mercury. 81, T L, Thallium. 82, P b, Lead. 83, B i, Bismuth. 84, P o, Polonium. 85, A t, Astatine. 86, R n, Radon. 87, F r, Francium. 88, R a, Radium. 89, A c, Actinium. 90, T h, Thorium. 91, P a, Protactinium. 92, U, Uranium. 93, N p, Neptunium. 94, P u, Plutonium. 95, A m, Americium. 96, C m, Curium. 97, B k, Berkelium. 98, C f, Californium. 99, E s, Einsteinium. 100, F m, Fermium. 101, M d, Mendelevium. 102, N o, Nobelium. 103, L r, Lawrencium. 104, R f, Rutherfordium. 105, D b, Dubnium. 106, Seaborgium, S g. 107, Bohrium, B h. 108, Hs, Hassium. 109, M t, Meitnerium. 110, Darmstadtium, D s. 111, Roentgenium, R g. 112, C n, Copernicum. 113, N h, Nihonium. 114, F l, Flerovium. 115, M c, Moscovium. 116, L v, Livermorium. 117, T s, Tennessine. 118, O g, Oganesson.
According to VSEPR theory, how should the molecular shape of AsF3 be classified?
(1 point)
Responses
trigonal planar, because the arsenic atom forms three single covalent bonds and has no lone pairs
trigonal planar, because the arsenic atom forms three single covalent bonds and has no lone pairs
trigonal pyramidal, because the arsenic atom forms three single covalent bonds and has one lone pair
trigonal pyramidal, because the arsenic atom forms three single covalent bonds and has one lone pair
tetrahedral, because the arsenic atom forms bonds with the three atoms and the lone pair
tetrahedral, because the arsenic atom forms bonds with the three atoms and the lone pair
linear, because the arsenic atom forms bonds with only one other type of atom
1 answer
To determine the molecular shape of AsF₃ (arsenic trifluoride) using VSEPR (Valence Shell Electron Pair Repulsion) theory, we need to consider the following:
The arsenic (As) atom is the central atom.
It is bonded to three fluorine (F) atoms.
Arsenic typically has one lone pair of electrons remaining after forming three bonds.
Now, according to VSEPR theory:
The presence of three bonded atoms and one lone pair gives a total of four regions of electron density around the arsenic atom.
The arrangement corresponding to four regions of electron density is tetrahedral.
However, because of the presence of a lone pair, the molecular shape is adjusted. The three bonding pairs of electrons are positioned as far apart as possible, resulting in a trigonal pyramidal shape.
Therefore, the correct classification of the molecular shape of AsF₃ is:
trigonal pyramidal, because the arsenic atom forms three single covalent bonds and has one lone pair.
1 answer