00:00Hi friends, Ki Hajar Dewantra said, it's not because we're smart that we learn, but because we learn, we become
00:07smart.
00:10Silver oxalate contains silver ions.
00:14Now, we ask to identify atoms or ions that have the same electron configuration as silver ions in their ground
00:20state.
00:24A number of electrons orbit around the atomic nucleus.
00:30Each electron occupies its own quantum state.
00:33It's impossible for an electron to have all quantum numbers with the same value.
00:38So, the electron configurations are said to be the same if and only if the number of electrons in an
00:43atom or ion is the same.
00:47In our problem, we are using a sample of silver oxalate.
00:51Silver oxalate dissolves in water as two silver ions and one oxalate ion.
00:57Let's start by looking at the nucleus of the silver atom.
01:01A silver atom has 47 electrons.
01:05According to the Bohr atomic model, its electron configuration is 2, 8, 18, 18, 1.
01:13Silver ions form when electrons in the atomous shell are excited to the infinity shell, a silver plus ion.
01:20A silver plus ion has 46 electrons.
01:26Other atoms or ions will have the same electron configuration in the ground state as the silver plus ion when
01:31the number of electrons is 46.
01:35I don't know it myself, the atomic number of each atom can be seen in the periodic table of elements
01:40given along with the question.
01:44Indium has 49 electrons.
01:47So the indium 3 plus ion will have 46 electrons after 3 electrons are excited.
01:54Krypton has 36 electrons.
01:58Palladium has 46 electrons.
02:01So the palladium ion will have 44 electrons after 2 electrons are excited.
02:08Gold has 79 electrons.
02:11So the gold ion will have 78 electrons after 1 electron is excited.
02:18Cadmium has 48 electrons.
02:24Among all the answer choices, only the indium 3 plus ion has 46 electrons.
02:32As long as each electron is in the ground state, not excited to a higher shell, the electron configuration of
02:38these two ions is the same.
02:41Because each electron will occupy the lowest energy level first.
02:48Happy learning everyone!
02:52Happy learning everyone!
02:53Happy learning everyone!
02:53Happy learning everyone!
Comments