Question

classify the following elements as halogens, alkali metals, alkaline earth metals, or noble gases. drag the appropriate elements to their respective bins. view available hint(s) br ar sr f li k halogens alkali metals alkaline earth metals noble gases

Explanation:

Step1: Recall group definitions

Halogens: Group 17 (7A), elements: F, Cl, Br, I, At.
Alkali metals: Group 1 (1A), elements: Li, Na, K, Rb, Cs, Fr.
Alkaline earth metals: Group 2 (2A), elements: Be, Mg, Ca, Sr, Ba, Ra.
Noble gases: Group 18 (8A), elements: He, Ne, Ar, Kr, Xe, Rn.

Step2: Classify each element

• Br (Bromine): Group 17 → Halogens.
• Ar (Argon): Group 18 → Noble gases.
• Sr (Strontium): Group 2 → Alkaline earth metals.
• F (Fluorine): Group 17 → Halogens.
• Li (Lithium): Group 1 → Alkali metals.
• K (Potassium): Group 1 → Alkali metals.

Answer:

• Halogens: Br, F
• Alkali metals: Li, K
• Alkaline earth metals: Sr
• Noble gases: Ar