In an uncharged atom, the atomic number is also equal to the number of electrons.. The number of protons in the nucleus of an atom determines an element's atomic number. Accordingly, the number of protons, which is always equal to the number of electrons in a neutral atom, is also the atomic number. kanyapowell56 kanyapowell56 5 minutes ago Physics High School +5 pts. After reading this section you will be able to do the following: Define and determine the atomic number of an atom. Asked Feb 22, 2020. The Periodic Table. More commonly, the isotope symbol already tells you the atomic number. Join now. Define and determine the mass number of an atom. This atomic number tells you the the number of protons and electrons in an atom . 1 views. 1. What does the atomic number tell you … The atomic number is usually in the top-left or top-center of the square containing the element's information. Why is the Group Number of an Element important?. Ask your question. The atomic number tells you how many protons are within one atom of that particular element. However, electrons can be removed, so the atomic number does not tell us the number of electrons in ions of atoms. Mass number is the sum of the protons and neutrons #("n"^0")# of a particular isotope. What is an atom's atomic number? How do you know how many electrons there are surrounding the nucleus of a particular atom? The atomic number is the number of protons #("p"^+")#.In a neutral atom, the number of electrons #("e"^(-)")# equals the number of protons. For example, a lithium atom (Z=3, A=7 amu) contains three protons (found from Z), three electrons (as the number of protons is equal to the number of electrons in an atom), and four neutrons (7 – 3 = 4). In many cases this will be the same number as electrons, but this is not guaranteed. What does the atomic number tell you about an atom? Look for the atomic number. For example, if the symbol is written as 14 6 C, the number "6" is listed. Given an atomic number (Z) and mass number (A), you can find the number of protons, neutrons, and electrons in a neutral atom. What does the atomic mass tell you about the atom of that element? When you subtract the number of protons (equal to the atomic number) from the atomic mass, the result is 6. When you round 10.81 to the nearest integer, the result is 11. An element in group 2 has 2 electrons in its outer shell. The atomic number uniquely identifies a chemical element.It is identical to the charge number of the nucleus. 24. The atomic number is the smaller of the two numbers in the symbol. What does the mass number tell you about - 18437029 1. The group number of an element in the periodic table is the same as the number of electrons in its outer shell.. An element in group 1 has 1 electron in its outer shell. It also tells you the number of electrons, as an atom always contains the same number of protons as electrons. Therefore, the most common isotope of boron has 6 … Log in. Join now. For example, boron (B) has an atomic mass of 10.81 and an atomic number of 5. Question: What does the atomic number of an element tell you about the element? ATOMIC NUMBER AND MASS NUMBERS. Step 1. Log in. If you have mass number and atomic number, subtract the atomic number from the mass number to get the number of neutrons. What does the atomic number of an element tell you about the element? This number tells you how many protons, or positively charged particles, the elements' atoms have. Atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Question. The atomic mass tells us the weight of protons and neutrons. 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