Chemistry S2 Vocabulary Review 2024 (M5-10, M23)

the periodic repetition of chemical and physical properties of elements when arranged by increasing atomic number

(a)  

the number of protons in an atom

(a)  

vertical columns of elements arranged in order of increasing atomic number on the periodic table

(a)  

horizontal rows of elements arranged in order of increasing atomic number on the periodic table

(a)  

elements in groups 1, 2, and 13–18

(a)  

elements in groups 3–12

(a)  

one of the three main classifications of the periodic table

(a)  

group 1 elements, except hydrogen

(a)  

group 2 elements

(a)  

elements in groups 3–12, except lanthanide and actinide elements

(a)