Atomic Radius vs. Atomic Number Atomic Number: 3 4 6. 7 9. LI Be Atomic Radius (pm): 152 111 83 77 70 66 72 The table shows the atomic radii, in picometers, for elements in period 2 of the periodic table. Which statement correctly explains the general trend in atomic radius from Li to F? A Additional electrons decrease proton repulsion, pulling electrons inward. Additional protons increase electron repulsion, pushing electrons outward. C Additional protons increase electron attraction, pulling electrons inward Additional electrons decrease proton attraction, pushing electrons outward. Save/Exit 1

ENRICHMENT Fill in the blanks. Complete the statements about the features of the elements in the periodic table. Choose from the given pool of words below. CARD 1 #Fullfilled energy level atomic number orbital/sublevel family period f-block s-block p-block d-block electrons is one of the bases of how are the with Increasing elements in the Periodic Table are arranged. Elements similar properties are grouped as, 2 where the elements have the same number of electrons in their outermost shell and 1 3, where the elements have the same number of main energy levels. The periodic table of elements consists of 4 columns (Group 1A and Group 2A); the (Groups 3A to 8A); the, 2B); and the lanthanides and actinides. This number of columns for each 2 _, 6 columns 10 columns (Groups 3B to 14 columns under the group of 7 block corresponds to the number of electrons capable of filling up the s, p, dand forbitals. Given the electron configuration of the element oxygen, 1s2 s2$ 2p4, the numerical…

esc - a . 10 11 12 = 13 14 15 B B 16 17 18 19 20 21 22 23 24 26 27 28 29 30 31 32 33 or 25 :0 Y F1 1 F2 X N> A F5 8 T H|V R E 5 You will use the known periodic trends to compare properties for elements indicate with letters in this periodic table. Consider their relative positions for these questions. Your answers will be letters as indicated above, not the actual element symbol they would coordinate to. (Do not use a real periodic to answer this question.) • Which element would be expected to have the lowest first ionization energy? A • Which labeled element in the fourth period of the chart above has the highest quantity electron affinity energy? A MacBook Air DOO 80 DOO DII DD F3 F4 F6 F8 F9 F10 F7 A LIQ A 0 F11

9% ר ווקרווווונסון רבמן9 Name the element in the second period of the periodic table with 5 valence electrons. element name: element name: Name the element in the second period of the periodic table with six 2p electrons. Phosphorus element name: Name the element in the fourth period of the periodic table with two 4p electrons. Carbon element name: Resources Germanium Name the element in the fifth period of the periodic table with 6 valence electrons. Tellurium I Lx Give Up?

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02 Math Short Answer -/3 Type the name (or symbol), the electron configuration, and the noble-gas notation of the element located in the second period and has a total of 4 electrons? [Ar]4s? 1s²2s²2p°3s²3p°4s² 03 Math Short Answer -/3 Type the name (or symbol) and the noble-gas notation of the element located in the third period and has a total of 17 electrons? %23 O 73°F Sunny 4:41 PM 11/7/2021 insert prt sc delete %23 3 4 8.

Order the following elements from largest atomic radius to smallest? Group of answer choices Ca > Ga > Se > Kr Kr > Se > Ga > Ca Ga > Ca > Se > Kr Kr > Ca > Ga > Se

4. Calcium has 20 electrons in total. The ionization energy for the first 18 have been graphed below. Provide appropriate labels for the two empty boxes. IONISATION ENERGY (kJ mol¹) 120000 100000 80000 60000 40000 20000 O IE3: REMOVAL OF ELECTRON FROM 3p 1 2 3 IE 17: REMOVAL OF ELECTRON FROM 2s 4 5 6 7 NUMBER OF ELECTRONS REMOVED 8 9 10 11 12 13 14 15 16 17 18

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