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A single atom of an element has 21 neutrons, 20 electrons, and 20 protons. Which element is it? K Zr Ca Sc

Justin Parker

in Chemistry

1 answer

1 answer

Brandon Scott on November 28, 2018

atoms are made of 3 types of sub atomic particles; protons , neutrons and electronselectrons are negatively charged, protons are positively charged and neutrons are charge neutral.atoms of elements are neutral with an equal number of protons and electrons.The atomic number is the number of protons. the atomic number is characteristic of each element. to identify an element that you have to know the number of protons. the given atom has 20 protons so the atomic number is 20. we can check the periodic table to find the element with the atomic number of 20the element with an atomic number of 20 is Ca. the answer is Ca

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