Answer:
Alkali metals = have one valance electron
Alkaline earth metals = have two valance electrons
Transition metals = Group 3- 12.
Halogens = have seven valance electrons
Includes fluorine, chlorine, bromine, iodine, and iodine.
Noble gases = Other than He have 8 valance electrons.
Explanation:
Alkali metals = have one valance electron
Alkali metals are present in group one. All alkali metals have one valance electron.
Alkaline earth metals = have two valance electrons
Alkaline earth metals are present in group two. All alkaline earth metals have two valance electrons.
Transition metals = Group 3- 12.
Transition metals are present in middle of periodic table. Transition elements are present in group 3-12.
Halogens = have seven valance electrons
Halogens are present in group seventeen. All halogens have seven valance electrons. Halogens elements ,
Includes fluorine, chlorine, bromine, iodine, and iodine.
Noble gases = Other than He have 8 valance electrons.
Noble gases are present in group eighteen. All noble gases are inert.
Answer:
Below are the answers
11. Have 1 valence electron
ANSWER A alkali metal
12. Includes fluorine, chlorine, bromine, and iodine
ANSWER D Halogen
13. Groups 3 - 12.
14. Have7 valence electron
ANSWER D Halogen
15. Other than He, have 8 valence electrons
ANSWER E noble gases
16. Have 2 valence electrons
ANSWER B akali earth metal
17. Include silver, Ag, gold, Au, iron, Fe, and copper, Cu
ANSWER C transition metals
18. Include magnesium, Mg, calcium, Ca among others
ANSWER B akari earth metal
19. Cannot judge valence electrons by their group number(s)
ANSWER C transition metal
20. Sodium is classified as one of these
ANSWER alkali metal
