Matter & Change
What type of properties can you observe without changing an object?
Physical Property
What part of an atom has a positive charge and what part of an atom has a neutral charge?
Protons (+) and neutrons (0)
the s orbital hold this number of electrons
2 electrons
How is the periodic table organized?
Increasing atomic number
This type of bond forms when the electronegativity difference is equal to or greater than 2
Ionic bond
What do you add to the front when naming covalent compounds
Prefixes
The ability to react...
Chemical property
________________ have negative charges and arrange themselves in _____________ around the nucleus.
Electrons & Shells
The p orbital holds this many electrons
6 electrons
How many valence electrons does Neon have? What energy level are the valence electrons in?
8 valence electrons in the 2nd energy level
This type of bond forms between two nonmetals
Covalent bond
Balance the following equation:
__ Au2O3 --> __ Au + __ O2
2, 4, 3
Children fighting over a teddy bear accidentally rip it in half. What kind of change has occurred?
Physical change
Protons + neutrons = ???
Mass number
Valence electrons are found in these orbitals
The highest s and p orbitals
What element has the highest electronegativity?
Fluorine
Electrons are _____ in covalent bonds
Shared
Identify the reaction type for the following equation:
2 Fe + 3 Cl2 --> 2 FeCl3
Synthesis
A change in the composition of matter.
Chemical change
Protons - charge = ??
Electrons
How many valence electrons does Potassium have?
5 valence electrons
What element has the largest atomic radius?
Francium
Draw an arrow transfer diagram/Lewis dot structure to show the bond that would form between Tin (IV) and Fluorine
Ms. Nagel will judge
Complete the following calculations, indicating your final answer with the correct number of significant figures:
46.8 + 41.4 = ??
5.4
What type of changes will alter the properties of a substance?
Chemical change
Isotopes have the same number of _____ and different numbers of _____.
protons (atomic number), neutrons (mass number)
What element has the following configuration:
1s22s22p63s23p5
Chlorine
Order the following elements from biggest atomic radius to smallest: Ni, O, Hf, Se
Hf --> Ni --> Se --> O
Draw an arrow transfer diagram/Lewis dot structure to show the bond that would form between Strontium and Nitrogen
Ms. Nagel will judge
How many moles of carbon dioxide are found in 45.5 grams of carbon dioxide? (Correct sig figs and units)
1.03 mols CO2