Atomic Structure
What subatomic particles are found in the nucleus of an atom?
Protons and Neutrons
Which element has 80 protons?
Hg - Mercury
Ions and isotopes will have the same number of _________ as the neutral atom.
protons
How many valence electrons does Helium have?
2
Which element in the compound NaCl is the metal?
Sodium
electrons
What element is located in Period 3, Group 14?
Silicon
Isotopes have a different number of _________ which causes it to have a different _________.
Neutrons, mass
What type of ion is formed by Carbon according to the periodic table trend?
+ or - 4
Metalloids are found along the _________ of the periodic table.
zigzag or staircase
How many neutrons does Bromine have?
45 neutrons
I am the only nonmetal that is on the left of the periodic table.
Hydrogen
A cation is a __________ ion formed by ________ electrons.
positive, losing
Valence electrons _________ as you travel across a period, but _________ as you go down a group.
increases, stays the same
An unknown sample is matte grey and requires a lot of energy to melt into a liquid. Is the unknown a metal, nonmetal, or metalloid?
A metalloid
What does the atomic mass tell you? (Hint: # of ____)
# of protons and neutrons
Which group of elements will not form stable bonds?
Noble Gases (Group 18)
How many electrons are in a Si+4 ion?
10
Which two elements from the periodic table are the most reactive?
Fr- Francium and F- Flourine
List 3 properties of metals.
-High melting/boiling points
-malleable
-conductors
-shiny
What is the difference between an electron and a valence electron?
Valence electrons are in the outermost shell.
I am an element in period 2 that can form a cation or anion.
Carbon
How many neutrons are in Carbon-15?
9 neutrons
Which element has the larger atomic radius? K, N, or Cs
Cs- Cesium
An element is brittle, dull, and has a low melting point. What can you assume about the element's conductivity?
Poor conductor/ insulator