Which of the following sequences is an arithmetic sequence? O {1,2,4,7,...)
O {1,3,9,27,...}
O {1,4,7,10,...}
O {1,-2.4,-8,...}

{1,4,7,10,...}

Step-by-step explanation:

the reason is that the sequence has a definite common ratio

that is to say that

4-1=7-4

3=3

but others don't

yes

yes yes yes

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons