The Group on the Periodic Table that BEST demonstrates the concept that elements in the same Group are NOT required to have the same chemical properties is Group  a. I A (1)  b. IV A (14)  c. VII A (17)  d. VIII A (18)

Generally, how do atomic masses vary throughout the periodic table of the elements? A. They incrcase from left to right and top to bottom. B. They increase from left to right and bottom to top. C. They increase from right to left and top to bottom. D. They increase from right to left and bottom to top.

Which of these elements has the smallest atomic radius? A. Lithium B. Florine C. Bromine D. Chlorine

Which element is solid at room temperature and a good conductor of heat and electricity? A. hydrogen B. phosphorus C. boron D. sodium

1. The identity of an element is determined by: a. protons b. neutrons 2. Which of the following statements about the periodic table is TRUE? a. The alkaline earth metals are the most reactive group of elements b. The majority of elements on the table are metals c. All non-metals are gases at room temperature d. The most reactive non-metal is astatine 3. Fill in the table below for the following atom: ¹94W²+ (2 marks) Number of protons Element c. electrons d. all of these b. N

Using only the Aufbau (Building-Up) Principle, show the electron configuration of chromium (Cr). The atomic number of chromium is 24. Select one: a. 1s22s22p63s23p64s23d4 b. 1s22s22p63s23p64s24p4 c. 1s22s22p63s23p64s13d5 d. 1s22s22p63s23p64s23d3 e. 1s22s22p63s23p64s23d6

Classify each element as a halogen noble gas or either SHOW WORK A. NE B. BR C. S D. XE E. I