Chemical Reactions
What is formed during a chemical reaction but not a physical change?
What is New substances
What particles are found in the nucleus of an atom?
What are Protons and neutrons
What are the vertical columns in the periodic table called?
What is Groups
What type of reaction transfers energy to the surroundings?
What is Exothermic reactions
What is the reactivity series?
What is a list of metals ordered by their reactivity
What type of reaction occurs when oxygen reacts with a metal to form a metal oxide?
What is a Oxidation Reaction
What is the atomic number of an element?
What is the number of protons in an atom
What are the horizontal rows in the periodic table called?
What is periods
What is the main characteristic of an endothermic reaction?
What is It absorbs energy, causing the surroundings to cool
What do metals form when they react with dilute acids?
What is salt and hydrogen
In a chemical equation, what does the subscript number in a molecule represent?
What is the number of atoms in that molecule
What do you call the outer part of an atom where electrons are located?
What is the Electron cloud
What is a trend seen in reactivity within a group?
What is reactivity increases or decreases depending on the group
What is needed to start a combustion reaction?
What is an input of energy from a flame or spark
What is a displacement reaction?
What is a more reactive metal replaces a less reactive metal in a compound
What happens to the mass during a chemical reaction?
What is no overall change in mass
How is the periodic table arranged?
What is by increasing atomic number
What determines the placement of an element in the periodic table?
What is Atomic Number
What is the test for oxygen gas?
What is relighting a glowing splint of wood
How are metals below zinc in the reactivity series extracted?
What is by heating with carbon
Write the chemical symbol equation for the reaction of hydrogen and oxygen to form water.
What is 2H₂(gas) + O₂(gas) → 2H₂O(liquid)
What is the term for the total number of protons and neutrons in an atom?
What is Mass Number
Name a group of elements known for their lack of reactivity.
What are Noble Gases
What factors can increase the rate of a reaction?
What is increased temperature, increased concentration, or increased surface area
What is a redox reaction?
What is a reaction where oxidation and reduction happen simultaneously