Horatio drew a diagram to illustrate how magnetism is produced by electric currents. A copper colored wire has arrows emerging from its sides pointing away. The arrows are labeled magnetic field. Which best explains Horatio’s error? Magnetism is not produced by electric currents unless the wire is coiled. The magnetic field does not continually spread outward from the wire. The magnetic field is produced inside the wire, not outside of it. Magnetism is only produced when a metal bar is placed near the wire.

3 hours because it is a decent distance.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

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since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.