Answer:
Difference : group 1 elements are known as alkali metals, group 7 elements are known as transition metals
Similarities : Both group 1 and 7 elements become more reactive as u go down and up respectively
Which of the following is NOT an indicator of a chemical
reaction?
O A. Breaking into small pieces
OB. Producing a solid
OC. Changing color
OD. Producing light​
Answer:OD. Producing light
Explanation: