Which direction do the elements in periods follow in, on the Periodic Table?
What is horizontal rows.
100
What is the electron cloud?
What is the region in which the electrons move around in.
100
What is the atomic number and chemical symbol for.................. Mercury?
What is Hg and 80
100
What word means repeated in pattern?
What is periodic?
100
Fluorine, Chlorine, Bromine, and Iodine all have 7 dots around their chemical symbol what does this indicate?
What is the outer electrons.
200
True/ False Electrons closest to the nucleus have high energy.
What is False
200
How many electrons are in the 1st energy level? 2nd? 3rd?4th?
What is 2,8,18,32
200
What did Dimitri Mendleev do to the blank spaces on the Periodic Table?
What is he predicted the properties and mass numbers of new elements that had not been discovered.
200
Give 3 examples of nonmetals.
What is (answers may vary) oxygen, nitrogen, and carbon.
200
What are metals good conductors of?
What is heat and electricity.
300
What electrons have a higher energy level?
What is electrons farther away from the nucleus.
300
How many electrons are in Xenons first energy level?
What is 2
300
What are the three kinds of elements on the periodic table?
Non-metals metaloids and metals
300
Who led the arrangement of elements based on their properties and atomic masses.
What is Henry G.J. Mosely.
300
What does the study of collisions reveal about?
What is info about the inner structure.
400
What did great thinks 2400 years ago define atoms as?
What is smallest parts of matter
400
How many scientists did it take to find the 6 th quark?
What is 460
400
What metal has a low melting point and used in making gallium arsenide?
What is gallium
400
What is the atomic number and abrvjayion for Iridium?
What is Ir77.
400
The average atomic mass of of boronias close to what?
What is the mass of its most abundant isotope.
500
If you had the element Mn and the atomic number is____
and the mass of one of its isotopes is 134 how many neutrons are in an atom of this isotope? Fill in the blank!
What is _25_ and 109
500
What is Argentum Latin for?
What is Silver
500
What are the 4 parts on an elements cube in the periodic table? Name them in order( top to bottom)
What is element, atomic number, symbol and atomic mass.
500
What did Dimitri Mendeleev discover when he was looking for a way to organize the periodic table?
What is he saw that there was a pattern which was chemical properties found in lighter elements could be shown to repeat in heavier elements.
500
What are the 4 parts of an atom?
What is nucleus, electrons, protons, and neutrons.