What is the electron arrangement of silicon?   Enter electron arrangement as integers separated by commas.

A neutral atom has the following electron configuration: 2. 4. What is the chemical symbol for the atom?

2) Write the full orbital diagram for a carbon atom

If we say that electrons travel around the nucleus of an atom in rings or shells, we can assign that ring a limit on how many electrons they can carry.  We say that the ring that surrounds the nucleus has room for 2 electrons, then each ring after that has room for 8 electrons. The outer most ring is called the valence ring or valance shell and may or may not be full. Realistically, this might not be the most accurate way to diagramming electron distribution, but it helps us to see why they are where they are on the table and why they bond the way that they do. It also helps us establish the Group number at the top of each column. Let’s look at Carbon (C) – Given that C has an atomic number of 6: How many protons does it have?    D          How many electrons does it have?   E                                                  How many are in the first ring?    F              Second ring?  G       Draw the number of electrons around each of these elements on your periodic table.    What…

Write the electron configuration for a neutral atom of beryllium. 0 x 5

A group of students at College of the Canyons conducted an experiment. Two reactors contained different reagents. Reactor 1: sodium metal + argon gas Reactor 2: sodium metal + chlorine gas When the reactor was heated, reactor 1 did not show a chemical reaction between the sodium metal and argon gas. However, reactor 2 showed a vigorous reaction between sodium metal and chlorine gas to form sodium chloride at the same reaction condition. A) Write the electron configurations (noble-gas core notation) each for argon and chlorine atom. Ar: ____________________ Cl: _____________________ B) Explain the difference in the reactivity of the gases with sodium metal. Hint: Use the electron configurations in A).

Where are the valence electrons in an atom?

Calcium (Ca), manganese (Mn) and germanium (Ge) are elements in the fourth period of the Periodic Table. All elements form 2+ cations. Ca has a radius of 114 pm, Mn²* has a radius of 81 pm, and Ge2* has a radius of 87 pm. a) Write the electron configuration for Ca2* using the condensed noble gas notation. Identify which orbitals lose electrons to yield the 2+ cation. b) Write the electron configuration for Mn2 using the condensed noble gas notation. Identify which orbitals lose electrons to yield the 2+ cation. c) Write the electron configuration for Ge2 using the condensed noble gas notation. Identify which orbitals lose electrons to yield the 2+ cation. d) Explain the radius size trend for these three ions. (2-3 sentences)