Chemistry
These are particles in the nucleus of an atom.
Protons and neutrons
WHAT ARE THE THREE STATES OF MATTER
SOLID LIQUID GAS
What is the formula for Calcium Chloride
CaCl2
Baking ingredients for a cake results in what kind of change?
chemical change
The most electronegative element on the periodic table.
What is Fluorine?
The atomic number tells us this.
What is the number of protons?
The maxiumum number of electrons in the 2nd energy shell
What is 8?
Water is made of these two elements.
What is hydrogen and oxygen?
What group of METALS in the periodic table is the most reactive?
Group one metals
What bond wil be formed between one metal and one non-metal atoms?
Ionic bond
Group 18 elements on the right hand side of the periodic table of elements.
What are the Noble Gases?
___________ was the first to publish a system classifying elements (the periodic table) in 1869
Dmitri Mendeleev
Which element will most likely form positive ions?
Metals
Which element/s will form a molecule?
Neon
Hydrogen
Argon
Hydrogen
Name all 3 subatomic particles.
What are Protons, Neutrons, and Electrons
The maximum number of electrons in the first energy shell
What is 2?
What is the formula for Pentanitrogen monosulfide
N5S
Protons have this charge
What is a postive charge?
What are the 3 main bond types
What is ionic, covalent and metallic?
In an exothermic reaction, is heat absorbed or released?
released
The tendency of an atom to attract shared electrons is
ELECTRONEGATIVITY
Making ice cubes from water is what kind of change?
physical change?
Covalent bonding happens generally between these type of elements.
non-metals
Which molecules has the strongest IMFs?
C12H3402
NaCl
C24H15O34
NaCl (IT IS IONIC!!!!!)
The sum of protons and neutrons in the nucleus of an atom is known as the _________
mass number
or
mass
I have a charge of negative two and I am a metalloid. Who am I?
Tellurium (Te)
Carbon has two naturally occurring isotopes: carbon-12 and carbon-13. Abundance for carbon-12 is 98.89% and carbon-13 is 1.11% What is the average atomic mass of Carbon? ESTIMATE!
Closer to 12
Atomic Radius ________ from left to right and ________ from top to bottom in the periodic table
decreases, increases
What must be TRUE about the PARTICLES for the law of conservation of mass to be respected?
Atoms cannot be created or destroyed (same number of atoms)
Organize the following elements from highest to lowest electronegativity: Carbon, boron, Fluorine, Chlorine
Fluorine, Chlorine, Carbon, boron