To define: The terms orbital and electron shell.
Concept introduction: The basic unit of matter that has the properties of a chemical element is called atom. Atom is made up of subatomic particles (neutrons, protons, and electrons). The substance that is made from one type of atom is known as an element. Every element has a unique chemical symbol, atomic number, and atomic mass.
To relate: The electron shell to the principal energy levels.
Concept introduction: The basic unit of matter that has the properties of a chemical element is called atom. Atom is made up of subatomic particles (neutrons, protons, and electrons). The substance that is made from one type of atom is known as an element. Every element has a unique chemical symbol, atomic number, and atomic mass.
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- Write the electron configurations of Co, Co2+ , and Co3+.arrow_forwardDo a web search to identify each of the following elements>isotopes and indicate the number of neutrons, protons, and electrons in an atom of the element>isotope:arrow_forwardRefer to the following figure (first three rows of the periodic table) to answer the questions below. What element does not react with other elements? Group of answer choices A. hydrogen B. helium C. oxygen D. siliconarrow_forward
- The atomic number gives thea. number of neutrons in the nucleus.b. number of protons in the nucleus.c. weight of the atom.d. number of protons in the valence shell.arrow_forwardfor the first 10 atoms from the periodic table determine: the atom full name and chemical symbol atomic number atomic mass how many protons, Neutrons and electrons? Abundance in naturearrow_forwardhow many hydrogen can be formed from the question abovearrow_forward
- Distinguish between each of the following pairs of terms: Neutron and proton Atomic number and mass number Atomic weight and mass numberarrow_forwardExplain why two atoms of hydrogen tend to combine into a molecule of hydrogen gas (H2).arrow_forwardClassify a molecule as organic or inorganic when given a molecular formulaarrow_forward
- The name given to the atomic particle found outside the nucleus of an atom isa. proton.b. neutron.c. electron.d. ion.arrow_forwardWhich element has only one proton?arrow_forwardVisit this website (http://openstaxcollege.org/l/ptable) to view the periodic table. In the periodic table of the elements, elements in a single column have the same number of electrons that can participate in a chemical reaction. These electrons are known as valence electrons. For example, the elements in the first column all have a single valence electron—an electron that can be donated in a chemical reaction with another atom. What is the meaning of a mass number shown in parentheses?arrow_forward
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