1.What is the trend in atomic radii as you move from left-to-right across a period? (1 Point)
generally increase
varies randomly
remains the same
generally decreases
2.The trend in the atomic radii as you move down the group 1 elements is partially due to
(1 Point)
increased number of electrons in outer energy level.
shielding by inner electrons.
decreased distance of outer electrons.
increased nuclear charge.
3.n which of the following pair is the second particle listed larger than the first?
(1 Point)
Pb, C
K, Ga
Br, Br−
Li, Li+
4.How many electrons does an atom generally need in its outer level to be the most stable?
(1 Point)
16
12
8
4
5.As you move from left to right on the periodic table, what generally happens to the ionization energy?Immersive Reader
(1 Point)
it decreases
it remains constant
it cannot be determined
it increases

Is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance