As the elements in Group 1 of the Periodic Table are considered in order of increasing acomic number, the atomic radius of each successive element increases. This is primarily
due to an increase in the number of
1) neutrons in the nucleus
3) valence electrons
2) unpeired electrons
4) electron shells
the said state each atom ofan element has two valence electrons. This element

What kind of ion is contained in salts that produce an acidic solution? a positive ion that attracts a proton from water a positive ion that releases a proton to water a negative ion that attracts a proton from water a negative ion that releases a proton to water

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

What type of matter is made of only one kind of atom