Me i beg you i really need

elements on the periodic table appear together in regions based on the energy sub-level that contains their outermost valence electrons. what are these regions called?

families
blocks
main-group elements
transition elements

mendeleev's periodic law has been restated to say that when the elements are arranged in order of increasing atomic number, there is a periodic pattern in their chemical and physical properties.

true
false

in 1894, william ramsey discovered the first of several non-reactive elements. which group of elements did ramsey discover that would alter the structure of the periodic table?

the transition metals
the noble gases
the halogens
the alkali metals

which of the following elements is man-made?

platinum
technetium
radon
cesium

what is the name of the group (family) that includes the elements radium, strontium, and magnesium?

noble gases
metals
alkaline earth metals
alkali metals

an element's atomic number is an indicator of its atom's:

number of protons
number of neutrons
charge
weight

an atom of oxygen contains 8 protons, 8 electrons, and 16 neutrons.

true
false

which of the following is not true of electronegativity?

generally increases as atomic radius decreases within a period
generally decreases as atomic number increases within a period
generally decreases as the principal energy level increases within a group
generally increases as atomic radius decreases within a group

which of the following elements possesses the most valence electrons?

argon
fluorine
helium
plutonium

how many dots should be drawn around the symbol, c, to create the lewis dot structure for a carbon atom?

two
four
six
eight

to achieve an octet in the valence energy level, a nitrogen atom will lose five electrons.

true
false

to achieve an octet in the valence energy level, a sulfur atom will become a cation.

true
false