Chemical Compounds. DO NOW Label the atom- proton, neutron, electron, nucleus. Label charges where they belong. (+) (-)

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Presentation transcript:

Chemical Compounds

DO NOW Label the atom- proton, neutron, electron, nucleus. Label charges where they belong. (+) (-)

Elements A pure substance that consists of just one type of atom Classified by the number of protons/electrons

Elements A pure substance that consists of just one type of atom Classified by the number of protons/electrons REMEMER– the number of PROTONS is EQUAL to the number of electrons!!

“atomic number” = How many protons/electrons a Boron atom has

Elements A pure substance that consists of just one type of atom Classified by the number of protons/electrons REMEMER– the number of PROTONS is EQUAL to the number of electrons!! Atoms have NO CHARGE… NEUTRAL

CHALLENGE: What element is this??

How to solve a challenge question “I see that……” “I know that…..” “I think that…….”

Chemical Compounds 2 or more elements combined

Chemical Compounds 2 or more elements combined Example- H 2 O

Chemical Compounds 2 or more elements combined Example- H 2 O – Hydrogen Hydrogen Oxygen

(K 2 SO 4 P 5 ) + Mg 2 Fe 3 2+  (KSO 4 3- ) 2 + KCl + CuPO 4 2-

Chemical Compounds 2 or more elements combined Example- H 2 O – Hydrogen Hydrogen Oxygen Elements “combine” to one another by chemical bonding

Chemical Bonding When 2 or more elements bond together, the result is often very different than the original elements Bond- join, combine, or come together Original- what you started with

Chemical Bonding Elements bond together, or combine/join with other elements by stealing or sharing electrons from other elements. Chemical bonds happen because of electrons

Ionic Bonding Elements take or give away electrons

Covalent Bonding Elements share electrons

Sodium

Sodium Chlorine

IONIC BONDING- stealing and giving away electrons

CHALLENGE What do you think the charge of the sodium atom and the charge of the chlorine atom is Now that they are bonded? Why?

What do you think the charge of the sodium atom and the charge of the chlorine atom is now? Why? CHALLENGE

REVIEW What is an atom? What are the 3 subatomic particles? What is the overall charge of an atom, and why?

Review What is an element? What does the “atomic” number tell us? What are some examples of elements?

Review What is a chemical compound? How do chemical compounds form?

REVIEW How does chemical bonding happen? (what does it involve?) What are the 2 types of chemical bonds we have learned about?

REVIEW Someone explain ionic bonding. Some explain covalent bonding!

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