WebAn atom contains 11 protons, 11 electrons and 12 neutrons. What is its atomic number and its mass number? Atomic Number = number of protons = 11 Mass number = number of protons + number of neutrons = 11 + 12 = 23 Number of electrons = number of protons so the atom is neutral. The Atom is neutral Sodium 23. Web11. Which best describe the valence electrons?A. Valence electron is also known as the inner - shell electronsB. Valence electron are electrons in the nucleus.C. Valence electron lie in the outermost electron shell of an element.D. …
The Periodic Table Chapter 4: The Periodic Table & Bonding
WebA particle of an atom contains 26 protons, 23 electrons, and 56 neutrons. What will be the correct atomic number for this particle? answer choices 26 23 33 56 Question 10 30 seconds Q. Which element could have a mass number of 86 atomic mass units and 49 neutrons in its nucleus? answer choices In Rb Rn Au Question 11 30 seconds Q. Web22 feb. 2024 · Beryllium-11 is a radioactive isotope of beryllium. It has a half-life of 2.52 minutes and decays into magnesium-11 by beta decay. The magnesium-11 then decays … in what states is the death penalty legal
How Many Protons, Neutrons, and Electrons in an Atom?
Webthere are 53 protons, and 127 − 53 = 74 neutrons in each nucleus. Skill-Building Exercise How many protons and neutrons are in each atom? It is not absolutely necessary to indicate the atomic number as a subscript because each element has its own unique atomic number. Many isotopes are indicated with a superscript only, such as 13 C or 235 U. Web5 mrt. 2024 · Instructions • • Use black ink or ball-point pen. Fill in the boxes at the top of this page with your name, • centre number and candidate number. • Answer all questions. Answer the questions in the spaces provided • – there may be more space than you need. • Show all the steps in any calculations and state the units. Some questions must be … Web11. 3. What is the correct ... Beryllium (Be): Atomic no.-4. Electronic configuration ... The atom is made up of a nucleus containing the protons and the neutrons. Around it are the electrons moving around. The electron configuration and orbital diagram tell us the orientation or location of electrons. in what states is recreational pot legal