Based on the periodic table what do you know about these elements?
They all have the number of energy levels/shells.
20
A researcher wants to experiment with an element that reacts like sulfur (S) but has a greater atomic mass. Which elements should the researcher select for the experiment?
Selenium, Tellurium, Polonium
25
What is the family group # and period for this element?
group 5. period 2
15
What characteristic of an element is the best indicator for determining what other elements it will react with?
The atomic mass of the element
the number of valence Electrons
The number of protons in the element
The number of neutrons of the element
15
Which of the following is true for elements listed in the same column of the periodic table?
they have similar chemical properties
mass of their atoms are similar
atoms are the same size
have the same number of protons
20
Based on the Periodic Table, which of the following elements has physical and chemical properties most like potassium?
Bromine
Neon
Sodium
Calcium
15
What common property do sulfur and oxygen have in common?
Both have 6 valence electrons
Both are gases
Sulfur and oxygen do not have a common property
Both are metals
15
When metals, nonmetals, and metalloids are compared according to luster, which is the best description of the appearance of metalloids?
Dull
Shiny
Either Shiny or Dull
Powdery
15
Which of the following lists of properties best describes nonmetals?
malleable, shiny conductor
brittle, shiny, conductor
Malleable, dull, insulator
Brittle, dull, insulator
15
What color is the blue section of the periodic table.
The Metals
15
Valence Electrons determie the __________________ .
Chemical Properties or Reactivity of the atom.
15
A student hypothesizes that sodium (Na) has different chemical properties than magnesium (Mg). Why would they think that?
Sodium and magnesium have different numbers of valence electrons. They are in different groups
15
What must be true of the element represented by the "X"?