(/eoc exam) the solar system moves at the speed of 828,000 km/h. tara writes the following steps to calculate this speed in decameters/second (dm/s). [1 km = 100 dm] step 1: divide 828,000 by 100. step 2: divide the result obtained in step 1 by 60. step 3: divide the result obtained in step 2 by 60. step 4: write the number obtained in step 3 with the unit dm/s. which step is incorrect in the conversion? step 1 step 2 step 3 step 4

he would use the colour black

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.