By looking at the relative positions of the elements calcium, Ca, fluorine, F, sulfur, S, and oxygen, O, in the Periodic Table, which TWO descriptions are TRUE about calcium fluoride, CaF2, and sulfur dioxide, SO2? CaF2 is an ionic compound, and SO2i is a covalent compound.

CaF2 is formed by covalent bonds, and SO2 is formed by ionic bonds.

CaF2 cannot conduct electricity when dissolved in water, but SO2 can.

CaF2 is a gas at room temperature, while SO2 has a high boiling point.

CaF2 has a high boiling point, while SO2 is a gas at room temperature.

CaF2 is soft at room temperature, while SO2 is hard and forms crystals.

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

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im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it