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15 Cards in this Set

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  • Back
Which symbol correctly represents an element (D) whose atoms contain 15 protons and 20 neutrons?
c.) 35/15 D
What is the ionic charge on the chromium ion in the ionic compound that has the formula Cr2O3?
a.) 3+
Which element when combined with chlorine would most likely form an ionic compund?
a.) lithium
The correct formula for calcium hydrogen phosphate is:
a.) CaHPO4
A cation is any atom or group of atoms with:
a.) a positive charge
Compounds that are composed of ions:
b.) are generally crystalline solids at room temperature.
A column of elements in the periodic table is known as a:
c.) group
A molecular formula:
c.) shows the number and kinds of atoms in a molecule of a compound
The metals in Groups 1A, 2A, and 3A:
D.) lose electrons when they form ions.
A formula that shows the lowest whole-number ratio of ions in an ionic compound is called a(n);
d.) formula unit
The representative particle for nitrogen is;
b.)a molecule
What is the molar mass of MgC2?
b.) 95.3 g
How many grams are in 6.50 moles of H2SO4?
a.) 638 g
Find the number of moles in 3.30 g of (NH4)2SO4?
d.) 0.0250 mol
What is the mass of 2.56 x 10^-4 moles of Fe2O3?
a.) 4.09 x 10-2 g