That matter(s)
They do not have a fixed shape, but take the shape of their container
What is a property of both liquids and gases?
A substance made of two or more atoms of different elements, chemically bonded together
Reaction that takes in thermal energy from the surroundings
What is an Endothermic Reaction?
Alkali metals
What is the name for elements in Group I?
This electrons can easily move from one atom to the next one
What are delocalized electrons?
They cannot be compressed
What is a property for both solids and liquids?
Element
What is a chemical substance that cannot be broken down into smaller/simpler substances?
Combustion, for example combustion of methane:
CH4(aq) + 2O2(g) → CO2(g) + 2H2O(g)
What is an example of an exothermic reaction?
In alkali metals, From top to bottom, it decreases.
What is the Melting point trend in Group I?
What are metal physical properties?
Melting point
What is the temperature at which a solid changes into a liquid?
Atoms of the same element, with the same number of protons, but different number of neutrons.
What is an Isotope?
when the difference between final and inicial temperature is possitive
Density and reactivity behavior in Alkali metals
What increases from top to bottom in Group I
They most of them produce produce hydrogen when react with water
What are metals?
What is the name for the change of state from gas to liquid?
Into Groups and Periods
How are elements arrange in the Periodic table
Acid and base react in an equal quantity. You can observe change of color from pink to transparent.
F, Cl, Br, I,
What are Halogens?
Their atomical structure allows them to be stronger than element structures
What are alloys?
Kinetic particle theory
What is the theory that describes the movement of particles in a substance?
2,8,8,2
What is the electronic configuration of Ca?
the diagram shows reactants are in a lower Energy value compared to products and possitive enthalpy.
What is an Endothermic reaction in a diagram?
Comes from the term "Salt-producing"
What is Halogen name?
calcium oxide + silica → calcium silicate
What is the reaction for formation of slag?