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Chapter 20 science
Terms in this set (45)
The attractive force that holds atoms or ions together?
Shows the types and numbers of atoms or ions making up the simplest unit of the compound
Always made of the same elements in the same proportion?
The arrangement of bonded atoms or ions within a substance? helps (determine properties)
Metals and nonmetals
Ionic compounds are formed between what types of elements?
What kind of chemical bond is formed when an Equal Exchange of electrons occur?
Atoms bond when their what interact?
Atoms want to have blank outermost blank levels?(then they will have a structure similar to that of noble gas)
A bond formed by the attraction between oppositely charged ions? (usually a metal and a nonmetal)
The metal attains a Blank charge and the non metal attains a blank charge?
Properties of ionic substances
High melting and boiling points, conductivity in molten or dissolved state crystalline, soluble in water
The opposite charges cause a very strong force of attraction called?
2 pairs of electrons are shared (a total of four electrons)
Triple bond and double bonds are awesome shorter stronger the single bond. T or F?
The compound composed of two elements?
Are groups of atoms held together by covalent bonds?
Is a compound that has water chemically attach to its chemical formula?
Group 18 they are noble gases ( full outer shell octet rule)
Which group on the periodic table is the least likely to combine with other elements to form compounds?
How many electrons are needed in the outer energy levels of most atoms for the atom to be chemically stable?
The blank tells you how many electrons in atoms gain lose or share to become stable?
Sodium has a positive charge in chlorine has a negative charge
Why do atoms of sodium and chlorine attract each other in a salt crystal?
What does the sum of the oxidation numbers in a neutral compound always equal?
What is a group of covalently bonded atom acts together as one charged atom called?
A chemical bond that occurs when atoms share electrons is what type of bond?
Na2s, 2 sodium atoms to one sulfur because of their changes
What is the number of sodium atoms compared to sulfur atoms in a binary compound made from these two elements?
With a super script
How do you show the oxidation number of an atom?
Left of the stair step line
Where are metals located on the periodic table?
The strongest type of bond is a blank bond?
Is it covalently bonded group of atoms that has a positive or negative charge that acts as a unit.
Blank number tells you how many electrons in an atom has gained lost or shared to become stable.
The elements that make up a compound and the exact number of atoms of each element in a unit of the compound can be shown in a blank?
An ion made of two or more atoms are covalently bonded in that act like a single ion? (usually read in parentheses)
If the name ends with the blank it indicates the ion with one more oxygen atom
If the name ends with a blank indicates that ion with one less oxygen
Polar covalent bond
An unequal sharing of electrons. an example would be water
What is the correct name of Na2so4?
What is the name of the compound with the formula LiF?
Have high melting points and can conduct electricity
anion positive charged
Anion Negative charge
Often formed between two nonmetals , usually have low melting points, do not conduct electricity well
Nonpolar covalent bonds
Formed when electrons are shared equally
A bond formed when atoms share one or more pairs of valence electrons to attend a noble-gas electron configuration (8 valence electrons)
Polar covalent bond
An unequal sharing of electrons
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