Which choices are correct based on the images providedwhat causes atoms to form covalent bonds? each atom and the shared electronsthe nuclei of the two atomsthe valence electrons of the two atomsenergy levelsprotons and neutronsvalence electrons

each atom and the shared electrons,

valence electrons

Explanation: A covalent compound is defined as the compound which is formed from the sharing of electrons between the element that are combining together.

These compounds are most likely to be formed when two non-metals combine together. For Examples:

Flourine is an element with tomic number 9 and has 7 valence electrons

Thus for formation of  a molecule, they share their valence electrons and attain stable configuration.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)