Reactions Quiz 1

In an endothermic reaction, heat is ...

• given out or released.

• taken in or absorbed.

• necessary.

• due to friction.

What type of reaction occurs in a hand warmer?

• surprised

• endothermic

• exothermic

• less than enthusiastic

Ionic bonds form between what types of elements?

• Transition metals and Alkaline Earth metalsl

• Metals and Non-metals

• Lanthanide series and titanium

• Sodium and Magnesium

Which of the below elements will most likely form an Covalent Bond?

• K and Cl

• Al and Mg

• H and O

• K and Na

A chemical reaction in which one element replaces another element in a compound can be categorized as a ...

• combustion reaction.

• single replacement reaction.

• synthesis reaction.

• decomposition reaction.

A chemical reaction has two elements as reactants. Which type of reaction might occur?

• Single replacement reaction

• combustion reaction

• synthesis

• decomposition

How many valence electrons does chlorine have?

• 7

• 8

• 6

• 3

What are two ways an atom an get a "full octet" of electrons in its valence energy level?

• Avoiding other atoms and bonding to noble gasses.

• Creating energy by copying its electrons

• Find 8 similar atoms and buying more

• Sharing and taking/giving away electrons

What is the definition of chemical reaction?

• The input which reacts chemically to create product

• he total mass of any isolated material system is neither increased nor diminished by reactions between the parts

• occurs when the atoms and molecules of one or more substances rearrange to form new substances

• the output, or result of a chemical reaction

A __________________ chemical equation shows that the same number of atoms in the reactants are also in the product.

• beautiful

• transferred

• rearranged

• balanced