The "__________" tells you the number of protons that are in the nucleus in an atom.
What is the atomic number of this nucleus? __________
In a neutral atom (an atom with neither a positive or negative charge) there must be an equal number of __________
What is the atomic number of gold below? __________
How many protons does this element have in its nucleus? __________
The atomic number of titanium is __________
How many protons does Cobalt have based on the element symbol below? __________
What is the atomic number of this nucleus and what is this element? __________
In order to change the identity of one atom into another we need to add protons. Selena wants to turn Carbon, which has 6 protons into Vanadium. How many protons does Selena need to add to Carbon's nucleus to make Vanadium? __________
Question 5
5.
Which of the following is the most accurate symbol for the element germanium based on the rules?__________
Why is this, br, the wrong symbol for the element bromine? __________
Why is this, i, the wrong symbol for the element iodine?__________
Which of the following elements has 24 protons in its nucleus? __________
Question 6
6.
Which of the following
3element symbols are incorrect based on the rules?
Question 9
9.
A) Where on the periodic table do the light elements appear?he heavier ones? __________
B) Where on the periodic table are the periods found? __________
C) What do the elements found in the same period have in common? __________
D) Where on the periodic table are the groups found? __________
E) What do elements found in the same group have in common? __________
F) What are valence electrons? __________
G) How do you determine the number of valence electrons? __________
H) The text says "the periodic table is read like a book". Why is a book a good comparison to the periodic table? __________
Question 10
10.
A) Neon (Ne) is in group __________ and therefor has 8 __________.
B) Sodium (Na) is in period __________ and therefore has 3 __________
Question 1
1.
You can learn a lot about the physical properties of an element by reviewing the periodic table.
The number that appears _______ the elements symbol is called the atomic _______ . The atomic number tells you the number of protons found in the _______ of that atom. So in the case of carbon you can see that it has 6 protons in its nucleus because its atomic number is 6.
In an atom of carbon that is neutral, there must also be 6 _______ . This is because the positive charge of carbons protons must be balanced by the negative charge of carbons electrons. Protons and electrons have an equal and _______ charge, so there must be an equal number of both in a neutral atom of an element.
Question 2
2.
The number that appears _______ the element symbol is called the atomic _______. The mass of an atom depends on the number of protons, neutrons, and electrons it contains.
However, since electrons are so small there mass is assumed to be _______ in most calculations. Therefore the atomic mass of an atom is equal to the _______ of its protons and neutrons. However, you will notice that carbon has an atomic mass of 12.01. This is because the number associated with the atomic mass on a periodic table is equal to the average of its naturally occurring _______ .
Question 3
3.
All of the isotopes of carbon _______ slightly in their atomic mass. When we average these together we get 12.01.
If you know the atomic number and the atomic mass you can determine the number of _______ in an element.
Simply _______ the atomic number or the number of protons from the atomic mass (the #p +#n). Take the closest whole number. So 12.01- 6 = 6.01, which rounds to 6. So the number of neutrons in a neutral atom of carbon is 6.