Which of the following statements about the periodic table is TRUE? a. The alkaline earth metals are the most reactive group of elements b. The majority of elements on the table are metals c. All non-metals are gases at room temperature d. The most reactive non-metal is astatine

7. How do man made elements fit into the periodic table?

A. A main element with the valence electron configuration 5s- is in periodic group group It forms a monatomic ion with a charge of B. A main group element with the valence electron configuration 5s 5p* is in periodic group It forms a monatomic ion with a charge of

Write the electron configurations for the elements below.  a. Boron  b. Lithium

Predict the charge of the ion most likely to form for each.a. F b. Sr c. Group VA d. The Noble Gases

Mark the following statements as true or false. If a statement is false, correct it to make a true statement. a. The mass number of an atom is the sum of its neutrons and protons. b. Electrons travel in orderly, circular orbits around the nucleus. c. Protons and neutrons have a positive charge and electrons have a negative charge. d. Valence electrons are the electrons in the outermost shell of an atom. e. Every element has a characteristic number of protons, which is called the element’s mass number.

Which of the following is an alkaline earth metal? A.K  B.Cu  C.Mg  D.Na  E.Al

A. A main group element with the valence electron configuration 3s is in periodic group 2 It forms a monatomic ion with a charge of B. A main group element with the valence electron configuration 4s-4p* is in periodic group 6 It forms a monatomic ion with a charge of

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For each element, give the following information: [1] total number of electrons; [2] group number; [3] number of valence electrons; [4] period; [5] number of the valence shell. a. carbon b. calcium c. krypton