Structure of the Atom
This particle is negatively charged
Electron
The periodic table is made up of 118 of these
elements
The atomic number is based on the number of this in the atom
protons
There are ____atoms of oxygen in H2O (water)
1
True or False
In a chemical reaction new products are formed
True
This particle is positively charged and has a mass of 1 amu
Proton
Group 18 (8) of the periodic table is made of non reactive gases called
Noble gases
Nitrogen has an atomic number of 7. This means it has this many protons in its nucleus
7
There are ___ atoms of hydrogen (H) in 3H2O
6
Why is ripping paper into shreds not an example of a chemical reaction
The chemical properties are still the same
A neutral particle that is the same size as a proton
Neutron
The groups in a periodic table behave in a similar way because they have the same number of these electrons
valence
In a neutral atom, the number of protons is the same as the number of this
electrons
These elements are in a molecule of glucose
C6H12O6
carbon, hydrogen and oxygen
When covalent bonds form atoms will ________ electrons
Share
These particles zoom around in the space outside the nucleus
Electrons
The periodic table arranges the elements according to increasing ____ number
atomic
The mass number is the number of protons + the number of ____ in an atom
Neutrons
3Mg(OH)2
True or false - there are 6 atoms of hydrogen (H) shown in this molecule
True
The first electron shell of an atom holds 2 electrons. The second level holds this many
8
These two particles are found inside the nucleus
Proton and Neutron
The elements in group one are the most reactive. They are called this
Alkali metals
You can find the number of neutrons in an atom by doing this (using the periodic table)
Atomic mass - atomic number = number of neutrons
CH4 +2O2 = CO2 +2H2O
There are ____atoms of oxygen total in the product of this reaction
4
The metals in the periodic table that show properties of both metals and non-metals are called this
metalloids