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)