chem test #1
which group includes elements with the most similar properties
0, s, and se
which of the following elements contain elements so highly reactive they are never found in the free state
1 and 2
According to the periodic table, how many neutrons are in a potassium atom that has an atomic mass of 41
22
What is the mass for silicon
28.1
According to the periodic table, the neutral atom of what element has 4 protons, 5 neutrons, and 4 electrons
berylium
which charecteristics do halogens and noble gasses have in common
both nonmetals
the chemical properties of calcium are most similar to what
mg
Which of the following elements has characteristics of some metals and also of some nonmetals
Antimony (51Sb)
According to the periodic table of the Elements, which element is most similar to Mg
Calcium (Ca)
Which of the following ordered pairs of elements shows an increase in atomic number but a decrease in average atomic mass
Co to Ni
Which of the following characteristics of an element can be determined precisely by considering ONLY the elements specific position on the periodic table?
Density of the solid.
which of the following elements has both metallic and nonmetallic properties?
Ge
Which of the following sections of the periodic table contains only metals
Group 2
Which of the following elements is a metalloid
Magnesium (Mg)
The atomic number of iron is 26, and the atomic mass is 55.847. What do these numbers mean in regard to protons, electrons and neutrons?
There are 26 protons and 26 electrons. Some atoms of iron have 29 neutrons; the .847 shows that there is more than one isotope of iron.
What do the elements sulfur (S), nitrogen (N), phosphorus (P), and bromine (Br) have in common?
They are nonmetals
which of the following statements describes properties of most metals
They share electrons to form covalent bonds
berylium is classified as
an alkaline earth metal
iodine would have chemical properties most like
chlorine (Cl)