Chemistry review 9 weeks
If an ion has 17 protons 12 neutrons and 19 electrons which best represents an electron configuration
1s2 2s2 2p6 3s2 3p6 4s1
what is the density of piece A
9g/cm^3
What is the result of removing electrons from an Neutral Atom
A cation
Elements in a group of the periodic table are described below these elements most likely belong to which group
Alkali metals
A chemistry student is studying atomic theory according to the bore model of the atomwhich is the correct relationship between and electrons energy and its location
Energy decreases as n increases
Which of the following best describes the elements within a group of the periodic table contains neon and Aragon gas
Gaseous at room temperature and mostly unreactive with metals
Which of the following describes a chemical property of matter
Helium does not form compounds
The term fluids refer to which they phase of matter
Liquid and gases
What element of the electron configuration AR 3d5 4s2
Mn
Which list of elements contain at least one metalloid
N As Cl
Which of these sets of almonds contain at least one metal
N O Br
Which of the following is the most appropriate action to take if I Nadena fied fumes begin to radiate throughout the laboratory
Notify the teacher that exit through a designated door
Which of the following group of elements have the most similar chemical properties
Potassium, rubidium cesium
Which list of elements contains at least one non-metal
Rb S Ti
After completing a laboratory exercise students have access chemicals left from the experiment what is the most appropriate thing to do with the head access chemicals
Read the MSDS sheet for the proper chemical disposal
What element has the electron configuration 1s2 2s2 2p6 3s2 3p4
S
With respect to physical and chemical properties which element is most similar to carbon
Silicon
Alkali metals react very brutally with allergens and form ionic compounds such as table salt and many others which of the following explanations most completely describe why these two families of elements react readily
The alkali metals have one Valence electron and the halogens are one short of an octet
Me too man delver organize the fridge guy table by placing them in an order by their atomic masses why is the modern periodic table not arrange this way
The atomic number is unique and increase by 1 proton for each element
Elements that have been replaced in the same group on the periodic table share what properties
The number of valance electrons and chemical behavior
Which statement best describes the noble gases in group 18
They have complete outer electron shells
Which is the following is the correct electron dot diagram for nitrogen
Two dots in the left and one every where else
Based on the information in the chart below which element is a nonmetal
V gas is not react chemically with any element
What is the best way to clean your hands after using chemicals in a laboratory experiment
Wash with soap and water
according to the current periodic law elements on the periodic table are arranged in order of their
atomic number
which process is not a chemical reaction
condensation
which state of matter has the greatest amount of kinetic energy
gas
of the observed properties listed which is considered to be an extensive property
mass
the student determines that the unknown substance is sodium chloride. which of the following is an extensive property of sodium chloride?
mass of 15g
which of the following is considered to be a chemical property of matter
reactivity
what physical property do group 18 elements have in common that allowed scientist to make assumptions about their structure and also led to their inclusion and specific placement on the modern periodic table?
stayed at room temperature
which statement best describes why a gas is easily compressible while most solids are incompressible
the molecules of a gas are much further apart than those of a solid
which of the following is the correct electron dot diagram for phosphorus
two dots on the left side and one dot on every other side and p in the middle
when a substance changes from a solid to a liquid its density normally decreases what is happening to the substance changes and the volume to a cause this decrease in density
volume and mass stays the same
Cording to the periodic law elements on the periodic table are arranged in order of their
Atomic number
Which device will most accurately Measure the volume of a liquid
Burette
