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Periodic Table
Periodic Table
When is an element reactive?
When it's valence electrons are not completing an outershell.
TRUE OR FALSE: electrons closer to the nucleus have stronger energy levels, and electrons further from the nucleus have weaker energy levels.
FALSE
Do polar molecules dissolve easily?
Yes, they break down amongst themselves.
When is an element's connection ionic and when is it covalent (not asking about the valence electrons)?
The answer I was looking for: because ionic bonds occur between (a) nonmetal and metal, whereas covalent bonds happen between either (a) nonmetal and a nonmetal, or a metal and metal.
Which type of bond shares electrons and which one transfer electrons?
Covalent bonds share electrons while ionic bonds transfer electrons.
What is a compound?
It is when different elements combine through chemical bonding.
What are the two different numbers of dots that can make out the full outer shell of an atom?
2 and 8
What types of bonds will always be polar?
Ionic bonds
TRUE OR FALSE: When an ionic atom loses electrons it becomes positive (and vise versa).
FALSE
... CO2 and why?
CO2 is covalent because it is a sharing between multiple non-metals.
What is CHNOPS and what does it stand for?
CHNOPS is the six elements that make up our bodies. It stands for Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, and Sulfur.
How can you figure out the valence electrons?
You look at the different group/columns in the periodic table counting the rows. Skipping the transition elements, you then got to 13-18 (3-8).
What is a good example of a non-polar item, what it doesn't do, and why?
Oil, it doesn't mix with polar molecules, this is because of the balance in how tightly "packed" the polar molecules are together.
Is an ionic bond between a positive and negative, negative and negative, or positive and positive charged ions?
Positive and negative
... (table salt) NaCl and why?
It is ionic because of it only being one a metal and one a nonmetal. (Yes, sodium is a metal).
How do metals' atoms act and what shapes do they form in the element?
They are tightly packed together in various "chunky" shapes.
Are electron models always correct, and why do you say that?
No. This is because it is merely an idea of what they supposedly look like.
What is a polar molecule?
A molecule that is partially positive and partially negative, making it uneven (electron-wise).
What is a metallic bond?
It is a bond between 2 or more metal atoms as they pool together their electrons.
TRUE OR FALSE: you can have as many ionic and covalent connections as you want as long as it fills the outer shell.
TRUE
What are the three sections of the periodic table and where are they located?
Metals (majority of space, mainly right), Metalloids (top left), and Nonmetals (strip in between both of the others)
Although electrons are little particles, they also appear as _______.
waves
What is a non-polar molecule?
it is a molecule that has an even number of electrons, making different shapes with their form.
What is it called in covalent bonds that allows the atoms to share electrons in the cloud?
Electronegativity
A molecule is which type of bond?
Covalent