I am so confused How are Salts formed ?
a) by the covalent bonding of neutral atoms
b) by the covalent bonding of oppositely charged ions
c) by the iconic bonding of a cation and an anion
d) by intermolecular hydrogen bonding
please get me the right answer

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

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

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?