What occurs between atoms that do not easily lose electrons?
What can group numbers on the periodic table help you determine?
What do atoms gain, lose or share when they bond?
How many valence electrons does helium need to have a full valence level?
What is a bond that forms when electrons are transferred from one atom to another?
What are the charged particles that form when atoms gain or lose electrons?
What does a sodium atom become when it loses its only valence electron?
What is the charge of an aluminum ion that has 13 protons and 10 electrons?
If the ending -ide is added to the name of an ion, what do we know about the ion?
What is the name of the three dimensional pattern that forms when ions bond?
Most molecules are composed of what?
Why can metals bend without breaking?
How are electrons in an atom organized?
What are the only parts of an atom that make chemical bonds?
What is the same within each group on the periodic table?
Why don't noble gases normally form chemical bonds?
What is the charge of a sodium ion with 11 protons and 10 electrons?
The more easily an atom gains an electron, what does it release more of?
What is the smallest particle into which a covalently bonded compound can be divided and still be the same compound?
What are the elements found in nature as diatomic molecules called?
Which of the following is NOT an example of a diatomic element?
What allows metals to bond?
Which of the following properties of a metal means that it can be drawn into wires?
Which of the following represents the number of protons in an atom?
How many electrons fill the valence level of an atom?
Which of the following statements describes a chemical change?
Which of the following is NOT a sign of a chemical reaction?
Which of the following occurs when water freezes?
What is the force that holds two atoms together called?
What causes chemical bonds in molecules to break?
How do substances form during a chemical reaction?
A calcium carbonate molecule has 1 calcium (Ca) atom, 3 oxygen (O) atoms, and 1 carbon (C) atom. Which of the following shows the chemical formula for calcium carbonate?
The chemical symbol for iron is Fe. The chemical symbol for oxygen is O. The formula for iron oxide, a type of rust, is Fe2O3. How many iron atoms are in one molecule of iron oxide?
What is the charge of an ionic compound?
Which of the following is the product in the chemical formula N + O2------> NO2?
Which of the following uses coefficients correctly to balance the equation N2 + H2------> NH3?
Which of the following states the law of conservation of mass?
Nitrogen dioxide is a covalent compound. How many oxygen atoms are in a nitrogen dioxide molecule?
How many oxygen atoms are present on the reactant side of the chemical equation 4Fe + 3O2 ------> 2Fe2O3?
Which of the following equations shows a double displacement reaction?
In a single displacement reaction,
An ion is
Which of the following will NOT increase the rate of a chemical reaction?
Which of the following chemical equations shows an endothermic reaction?
Which of the following is NOT an example of a chemical reaction?
Which of the following is an example of a diatomic molecule?
Which of the following phrases describes a catalyst?
How many atoms are represented in the formula CaCO3
If a chemical symbol in a chemical formula has no subscript, it means
Which of the following is the chemical formula for a dinitrogen trioxide molecule?
If it is brittle, dissolves easily in water, has a high melting point and conducts electric current, it is a(n)
Which compound has the weaker chemical bond?
When a metal reacts with a nonmetal it makes
Most covalent compounds
Sugar is a covalent compound that dissolves in water but does not form ions, so it
Covalent compounds have
What substances can acids react with to produce hydrogen gas?
Acids conduct electric current by forming
Acids have a
Bases have a
When a base is added to red litmus paper, the indicator turns
If a cleaning product includes ammonia as an ingredient, it probably is made from a(n)
When all the molecules of an acid break apart in water, the solution is called a
Citric acid is a weak acid, so only a few molecules would break apart when
When acids and bases come in contact with each other, they
One way to test pH is to use a strip of paper that has several
A neutral solution has a pH of
Sodium chloride, sodium nitrate and calcium sulfate are all
How many atoms can a carbon atom make bonds with?
Which hydrocarbon contains only single bonds between carbon atoms?
Carbohydrates, lipids, proteins and nucleic acids are all
What are aromatic hydrocarbons based on?
Brittleness and a high melting point are two properties of
When an acid and a base neutralize each other, what remains?
Over 90% of all compounds are of what type?