Chemistry STAAR Review

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Which element is in group 6 and period 4

Which subatomic particle(s) make up the atomic mass of an atom?

How many energy levels does Calcium (atomic number 20) have?

How many valence electrons does Aluminum have?

If an element has 38 protons, 50 neutrons and 38 electrons, how many negatively charged particles does it have?

An element has an atomic number of 21 and a mass number of 45. How many neutrons does the element have?

How many protons does potassium have?

Which element has a smaller atomic mass, but would react chemically similar to Sulfur?