University:
High School
Course:
High School Chemistry
Academic year:

2021
Views:

250

Pages:

2
Author:

Dean Huber

Worksheet: Atomic Radius Name: __________________________ As each successive element in Group 15 of the Periodic Table is considered in order of increasing atomic number, the atomic radius: A) remains the same B) increases C) decreases Which list of elements is arranged in order of increasing atomic radii? A) Sr, Ca, Mg, Be B) F, Cl, Br, I C) Si, C, O, N D) Li, Be, B, C Compared to the nonmetals in Period 2, the metals in Period 2 generally have larger: A) atomic radii B) atomic numbers C) electronegativities D) ionization energies According to the Properties of Selected Elements chemistry reference table, which element has the smallest atomic radius? A) potassium B) calcium C) nickel D) cobalt Which atom has the larger atomic radius? A) Na B) Mg C) K D) Mg Which sequence of elements is arranged in order of decreasing atomic radii? A) N, C, B, Be B) Li, Na, K, Rb C) Si, P, Cl, Ar D) Cl, Br, I, At In Period 4 of the Periodic Table, the atom with the largest atomic radius is located in Group A) 1 B) 15 C) 13 D) 18 Proceeding from left to right in Period 2 of the Periodic Table, the atomic radii of the elements generally: A) remains the same B) decreases C) increases The element in Period 2 with the larger atomic radius is A) a halogen B) an alkaline earth metal C) an alkali metal D) a noble gas Which electron configuration represents the element with the smallest atomic radius? A) 2,5 B) 2,6 C) 2,4 D) 2,3 Atomic/Ionic Radius and Electron Configuration | Element: | Electron Configuration: | Ion Symbol: | Number of Electrons Gained or Lost by the Atom: | Electron Configuration of the Ion: | Radius of Ion Compared to Atom (Larger/Smaller): | Noble Gas with same Electron Configuration as the Ion: | |---|---|---|---|---|---| | Fluorine | 2,7 | F⁻ | Gained 1 | 2,8 | Smaller | Ne | | Sodium | 2,8,1 | Na⁺ | Lost 1 | 2,8 | Larger | Ne | | Lithium | 2,1 | Li⁺ | Lost 1 | 2 | Larger | He | | Bromine | 2,8,18,7 | Br⁻ | Gained 1 | 2,8,18,8 | Larger | Kr | | Oxygen | 2,6 | O²⁻ | Gained 2 | 2,8 | Larger | Ne | | Magnesium | 2,8,2 | Mg²⁺ | Lost 2 | 2,8 | Smaller | Ne | | Calcium | 2,8,8,2 | Ca²⁺ | Lost 2 | 2,8,8 | Smaller | Ar | | Neon | 2,8 | Ne | None | 2,8 | Same | Ne | | Chlorine | 2,8,7 | Cl⁻ | Gained 1 | 2,8,8 | Larger | Ar | | Cesium | 2,8,18,18,8,1 | Cs⁺ | Lost 1 | 2,8,18,18,8 | Larger | Xe |