SWYK- P. Table

Which symbol represents carbon?  

• Ca
• N
• K
• C

Which of the following is an element?

• Air
• Salt
• Water
• Oxygen

The element beryllium (Be, atomic number 4 and atomic mass 9) is right above magnesium (Mg, atomic number 12 and atomic mass 24) in the periodic table. How many more electrons does magnesium have than beryllium?

• 5
• 7
• 8
• 15

Which elements are represented by the symbols in the formula NaCl?

• sodium, chlorine
• sodium, oxygen, hydrogen
• hydrogen, chlorine
• chlorine, oxygen

On the periodic table, nitrogen is represented by N (atomic number 7). N is a chemical

• Equation
• Period
• Symbol
• Group (Family)

All of the substances on the periodic table are classified as elements because they

• are pure substances.
• are composed of atoms.
• cannot be broken down into other substances.
• cannot be dissolved in water or other liquids.

Each element in the periodic table is assigned an atomic number. This number is the same as  

• the number of electrons in the atom's nucleus.  
• the number of protons in the atom's nucleus.  
• the number of neutrons in the atom's nucleus.  
• the number of protons and neutrons in the atom's nucleus.  

As you move across the periodic table from right to left within a period, the elements

• become less stable.
• become more reactive.
• change from gases to solids.
• change from metals to nonmetals.

Copper (Cu) is a transition metal found in the 11th column of the periodic table. What statement is true about copper and the two other elements in that column?

• All three elements are nonreactive.
• All three elements are in the same period.
• All three elements have the same number of protons.
• All three elements have similar chemical properties.

The diagram above shows a block from the periodic table. The number six represents the 

• atomic mass of the element carbon
• atomic number of the element carbon 
• number of neutrons in the element carbon
• number of valence electrons in the element carbon