Order the elements Sr, Ca and Se in order of decreasing atomic size. Explain your answer .

Some patterns of electron configuration are listed below. In each case, G] stands for a noble-gas core and n, m, or o stand for integer numbers like 1, 2, 3 and so on. Note: assume G is lighter than Rn. Think about the chemical elements made of atoms with an electron configuration that matches each pattern. In what block or blocks of the Periodic Table would these elements lie? Would they be metals, nonmetals, metalloids, some of each? Use your answers to these questions to complete the table. location of elements (check all that apply) electron configuration of atoms blocks metals or nonmetals? metals [G]ns' nonmetals metalloids metals S [G]ns°np° 6. nonmetals пр d O f metalloids metals [G]n?of*md"np° 14 10 4 m d пр nonmetals metalloids O O

1. Which of the following does have the largest size?  Z f I = 53,  Ga = 31,  Na = 11, Cl = 17

Fill in the information missing from this table: Some electron shells shell subshells 2s, 2p 4 2.

Which element has exactly four electrons in the highest occupied shell? Ge (atomic number 32) Zr (atomic number 40) O (atomic number 8) P (atomic number 15) none of these

Order the elements from smallest to largest in atomic size. Ca, K, As

2. Using the Bohr model, calculate the energy associated with the transition from n = 4 to n = 1 (in kJ/mol).3. What is the wavelength of light (in nm) associated with the transition described in question 2?

The plot below gives the electron density plot for a particular atomic orbital. Distance from the nucleus, r It is known that the orbital has 2 nodal planes. The principal quantum number for this orbital is +1 This orbital belongs to a subshell 1. 2. estion 2 Element Z and X are compared. Element Z is sma 4 element X Based on this comparison, which of the following ot yet mswered 1. Element X is from a period lower on the pi 2. Element Z is closer to the right hand side of the periodic table than element X ble than element 2 Electron density

Which of the following elements has the smallest atomic radius?     A)Sb B)I C)Te D)Rb E)Sn

Will the atom Zy be larger, smaller or the same in ion size than the oxygen atom. Explain your answer.