Chemistry, 28.07.2019 22:30, tylersabin72

Will give out brainliest.. name the 2 elements that have the same number of valence electrons. name the elements that would be classified as metals. name the 2 elements that are in the same period. name the 2 elements that are in the same family. name the element that has the smallest atomic number. if the atomic number of element c is 20, then what is the atomic number of element d?

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Physics, 23.06.2019 10:30, Chapo3760

Up of elements with the same number of valence electrons. vertical column in the periodic table of elements such as alkali metals or halogens. a horizontal row of elements in the periodic table. this is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table. periodic trend these are the highly reactive elements located in group 1 of the periodic table. these elements have one electron in their outer energy level which makes them highly reactive with water and halogens. these are the reactive elements located in group 2 of the periodic table. these elements have two electrons in their outer energy level which makes them reactive with water and halogens. alkaline earth metals these are the group 3 or d-block elements. these dense metals with high boiling points can have different oxidation states and all are solid at room temperature with the exception of mercury. transition metals this is the highly reactive family of elements with 7 valence electrons. this is an element with full valence shell, very unreactive. this is a group of elements with few valence electrons that conducts heat and electricity. one of a class of elements having properties intermediate to metals and nonmetals. this is a type of element that has many valence electrons, not a conductor.

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Biology, 30.06.2019 13:00, queenkimm26

Families in the periodic table have similar properties because they have the same number of valence or outermost electrons. for representative elements, or group a elements, the group number indicates the number of valence electrons. compare the valence electron configuration of the noble gas elements seen here. what statement is correct? a) s2p8. b) s2p6. c) s2p5 d) s4p4

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Physics, 06.10.2019 12:00, haileysolis5

1. mendeleev's periodic table of elements was organized by a. mass b. atomic number c. number of electrons d. number of protons 2. compared with group 6a elements, group 2a elements have a. more atoms in the ground state. b. more valence electrons. c. more isotopes. d. fewer valence electrons. 3. which element is found in most of the compounds in your body except for water? a. iodine b. potassium c. iron d. carbon 4. which of the following group 1a elements is the least reactive? a. cs (cesium) b. li (lithium) c. k (potassium) d. na (sodium) 5. to keep them from reacting, some highly reactive elements are stored in a. water. b. pure oxygen. c. liquid mercury. d. argon. 6. the tendency of an element to react is closely related to a. its atomic mass. b. attractions between its atoms. c. the number of valence electrons in atoms of the element. d. the ratio of protons to neutrons in atoms of the element. 7. the usefulness of mendeleev’s periodic table was confirmed by a. the discovery of subatomic particles. b. its immediate acceptance by other scientists. c. the discovery of elements with predicted properties. d. the discovery of the nucleus. 8. group 8a of the periodic table contains the a. least reactive metals. b. most reactive metals. c. least reactive nonmetals. d. most reactive nonmetals. 9. one twelfth the mass of a carbon-12 atom is used to define a(an) a. atomic mass unit. b. atomic mass. c. mass number. d. atomic number. 10. atoms of the least reactive elements tend to have a. one or seven valence electrons. b. eight valence electrons. c. four or five valence electrons. d. no valence electrons.

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Physics, 02.11.2019 03:31, lil8174

Which of the following statements about valence electrons and the periodic table is true? a) the number of valence electrons decreases from left to right across each period. b) the number of valence electrons increases from top to bottom within each group. c) all of the elements in group 9 have nine valence electrons. d) elements with the most valence electrons are in group 18.

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