CITES CAST BASICS review

Protons are atoms with a_____________ charge, and are found in the __________ of an atom

• positive, nucleus

• negative, nucleus

• neutral , nucleus

• neutral , outer shell

Neutrons are atoms with a_____________ charge, and are found in the __________ of an atom

• positive, nucleus

• negative, nucleus

• neutral , nucleus

• neutral , outer shell

Using the image of the element, how many protons, neutrons, and electrons are in the atom?

• P= 9

  E= 9

  N= 10

• P= 19

  E= 9

  N= 19

• P= 9

  E= 9

  N= 19

Count the number of atoms in the molecule

• P=10

  O=4

• P=1

  O=1

• P=4

  O=10

• P=14

  O=10

Valence electrons are electrons on the OUTER shell of an atom. They are involved in BONDING of an atom. As we go ACROSS the periodic table (from left to right), valence electrons...

• DECREASE

• INCREASE

• STAY THE SAME

Balancing Equation is related to the law of conservation of Matter because

• Balancing equations violates the law of conservation of Matter
• Balancing equations only applies to certain chemical reactions
• Balancing equations ensures that the total number of atoms of each element on the reactant side is equal to the total number of atoms of each element on the product side, thus following the law of conservation of matter.
• Balancing equations changes the total mass of the reactants and products

The Elements colored in RED in the Periodic table are _____

• Metals

• Nonmetals

• Semi-Metals

Atoms with a HIGH electronegativity will ____________ electrons from atoms with a LOW electronegativity. Electronegativity will ___________________ ACROSS the periodic table and _____________________ DOWN a group.

• give, increase, decrease

• Take, decrease, increase

• Take, increase, decrease

• give, decrease, increase

What are Endothermic Reactions?

• Endothermic reactions are chemical reactions that absorb heat from their surroundings.
• Endothermic reactions decrease the temperature of their surroundings
• Endothermic reactions are spontaneous in nature
• Endothermic reactions release heat to their surroundings

Count the number of atoms in the molecule

• H=3

  P=1

  O=4

• H=4

  P=3

  O=4

• H=12

  P=1

  O=4

• H=12

  P=4

  O=16