Periodic Table:
What is the Atomic Number?
the number of protons in an atom's nucleus
What is a period in the Periodic Table
They are rows of elements that span the entire periodic table (horizontally)
What element does O represent
oxygen
What is in the centre of an atom?
Nucleus
Who developed the modern Periodic Table and where is he from?
Dimitri Mendeleev from Russia
What is the equation for Atomic Mass?
Atomic Mass =
Number of Protons + Number of Neutrons
What is a group in the periodic table?
They are Collums of elements that share similar properties.
What element does B represent?
boron
What do you find inside the nucleus?
Protons & Neutrons
Is salty water a compound or mixture?
mixture
Name two Nobel Gasses
helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn)
How many Groups are there?
8 groups
What element does K represent?
potassium
What do you find orbiting around the Nucleus?
Electrons
What is physical change
change in the shape or appearance of an object. Is reversible.
Name two metalloids
Boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), and polonium (Po)
What are elements in Group 1 called?
Alkali metals
What element does Na represent?
sodium
How many shells does Magnesium have?
3
What is chemical change?
A chemical change is a reaction that forms a new substance that cannot be reversed back to its original form
Name all the elements until neon
1. Hydrogen (H)
2. Helium (He)
3. Lithium (Li)
4. Beryllium (Be)
5. Boron (B)
6. Carbon (C)
7. Nitrogen (N)
8. Oxygen (O)
9. Fluorine (F)
10. Neon (Ne)
How many periods are there in the Periodic Table?
7 Periods
What element does Ra represent?
radium
What do you call electrons on the outer shell?
Valence electrons
What is a covalent bond?
When two non-metal atoms share a pair of electrons.