Look at attachment please help with it, will mark brainliest <3 BUT ONLY IF CORRECT

In saturated organic compounds, all the bonds between carbon atoms are called?

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Is 343 in the sequence -5, -2, 1, 4, 7