An atom of element X has one more shell of electrons than an atom of
calcium, but it has one less valence
electron than calcium. Which element
is element X?

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

Give me a example of a decomposer. explain what would happen if decomposers were absent from a forest ecosystem

How is an electron dot structure used to represent a covalent bond?