Give the number of valance and core electrons for each. Valence electrons are from the group number. Core electrons are not valence electrons. It is valence electrons that are gained or lost in a chemical reaction. E has valence electrons and core electrons -1 has valence electrons and core electrons Cl has valence electrons and core electrons C" has valence electrons and core electrons O has valence electrons and core electrons p2 has valence electrons and core electrons Ne has valence electrons and core electrons 1. 0 b. 1 С. 2 d. 3 е. 4 f. 5 g. 6 h. 7 i. 8 j. 9 . 10 I. 11 m. 12 n. 13 О. 14 р. 15 q. 16 r. 17 s. 18 19 u. 20

atomic number is the number of  1. radioactive isotopes of an element 2. protons in an atom of an element 3. protins and electrons in an atom of an element 4. neutron in an atom of an element

Unlike lonic bonds where electrons are transferred between elements, COVALENT bonding is a explained as a bond that forms when atoms are electrons sharing In a covalent bond, the nucleus has an for both its own electron and the electron of the other atom. attraction In a covalent bond, electrons spend almost all of their time the two nuclei sharing

Use the chart below to answer the questions. Charge Group Element Na Ar Mg CulLI) Alkall metal Halogen Noble gas Alkaline Earth metal Transibion metal 2+ 24 Which of the following pairs of elements would likely form an ionic bond? A. Na and F B. Mg and Cu (II) C. ArandE D. Ar and Mg

o Group the elements into pairs that would most likely exhibit similar chemical properties. It does not matter which pair of elements is pair 1, pair 2, or pair 3, so long as the correct elements are paired. Ar Pair 1 Mg As He Pair 2 Answer Bank N Sr Pair 3

Predict the charge of the ion formed by  element and write the electron configuration of the ion. Na

The number of electrons in a neutral atom spread the element its unique identity. True False

Tools Ad-ons Hetp ccessibility BIUA Dロ- F mE Total Electric Number of inotope Name (qun s ) Atomic Number of Neutrons Number of Number Protons Charge Electrons Zine 6 +2 143 92 Plosine 2 21

How many electrons and protons are contained in each cation? a. Au + b. Au 3 + c. Sn 2 + d. Sn 4 +

How many valence electrons are in the atoms selenium, Z = 34, and chlorine, Z = 17? A)Number of valence electrons in Se is 4 electrons Number of valence electrons in Cl is 5 electrons B)Number of valence electrons in Se is 6 electrons Number of valence electrons in Cl is 7 electrons C)Number of valence electrons in Se is 14 electrons Number of valence electrons in Cl is 7 electrons D)Number of valence electrons in Se is 34 electrons Number of valence electrons in Cl is 17 electrons