atoms and bonding
PLEASE READ THIS AND HELP ME OUT!
Hey guys, uhh so I don't really like getting help with homework but there are some questions on my science homework, and I love science, but its about atoms, and I don't really understand atoms so I am asking for some help, all right so this is 9th grade science so hope u guys can help, thanks-
MULTIPLE CHOICE-
*The electrical charge on an atom as a whole is-
A)neutral B) negative C) positive D) dependent on the atomic number
*Chemical bonding occurs so that atoms can-
A) gain electrons B) lose electrons C) share electrons D) obtain complete outermost energy levels
*An ionic bond results from-
A) the sharing of electrons B) attraction between oppositely charged ions C) attraction between ions having the same charge D) attraction between neutrally charged atoms
*Atoms with a low ionization energy-
A) lose electrons easily B) gain electorns easily C) tend to form negative ions D) tend to remain neutral
*The properties of metallic solids result from-
A) ionic bonds B) covalent bonds C) freely moving electrons D) freely moving nuclei
*The type of bond that forms between sulfur and oxygen is-
A) metallic B) ionic C) covalent D) none of the above
* An atom with an oxidation number of -2 -
A) has 2 valence electrons B) will form an ion with a charge of +2 C) will form an ion with a chrage of -6 D) has 6 valence electrons
*A chlorine atom has-
A) 1 valence electron B) an oxidation number of 17 C) 7 valence electrons D) a filled outermost energy level
*When writing formulas the sum of the oxidation numbers must equal-
A) 1 B) 8 C) 0 D) 3
FILL IN THE BLANK-
-Word Bank-
Protons Molecule Covalent Metallic Polyatomic ions Crystal lattice Neutrons Electron cloud
*The regular, repeating arrangement of ions in an ionic compound results in the formula of a(n) _________.
*A(n) _________ is a group of covalently bonded atoms that acts as a single atom.
*A "sea of electrons" occurs when covalent bonds form.
*The bond formed between two nonmetals would be ________.
*Which of the following elements will lose electrons when forming chemical bonds? Explane your answer.
A) potassium B) sodium C) chlorine
*Calculate the oxidation number of listed element from each compound.
Cu2O oxidation number of copper ________
THANKS GUYS FOR ANY HELP YOU COULD GIVE ME! :)
|