Names of Elements
What element is with the symbol He
Helium
What is the common name for compound, NaCl?
table salt
The number of particles in 1 mole, known as Avogadro’s number is
6.02 x 1023
What is the most reactive metal in the reactivity series for the first 20 elements on the periodic table?
Potassium
The lightest element on the periodic table
Hydrogen
What element, with the symbol Cu, is used in electrical wiring.
copper
What compound is H₂O₂, often used as a disinfectant?
Hydrogen peroxide
The mass of 0.25 mole of water (H₂O) in grams.
4.5 grams
This metal, commonly found in coins, is less reactive than zinc but more reactive than silver.
Copper
What element is in Group 17, period 3?
Chlorine (Cl)
What is element with the symbol K, which is essential for plant growth.
potassium
What is the chemical formula for baking soda.
NaHCO3
What is the unit for the molar mass of a substance?
g/mol or grams per mole
In the reactivity series, this metals is known for rusting easily.
Iron
What term is for elements in Group 1, known for being highly reactive with water.
Alkali metals
What radioactive element has the symbol U?
uranium
What is the name of this compound, C12H22O11?
Sucrose
What is the number of moles in 4.5 grams of ammonia?
0.26 mol
What gas is produced when an active metal reacts with an acid?
Hydrogen
What is the only non-metal that is liquid at room temperature?
Bromine
What element, W, is known for its high melting point and use in light bulb filaments.
tungsten
What is the chemical name for C6H6, a fuel for Jets?
Benzene
What is the molar mass of Penta phosphorous dichloride?
226 g/mol
Which of the two is less reactive between Cu and Au?
Au ( Gold is the least reactive metal)
A student was playing with Cute poison. What two elements was the student playing with?
Copper and Tellurium