Atomic Theory
This property of electrons allows them to move between shells when they gain or lose energy.[1]
Answer: What is energy
The table that compares charge and location of proton, neutron, and electron is called this kind of table.[1]
Answer: What is a table of subatomic particles
On the simplified periodic table in your notes, this number is shown above the element symbol.[1]
Answer: What is the atomic number
Region A on the simplified periodic table in your notes contains these strongly reactive metallic elements.[1]
Answer: What are alkali metals
A substance that breaks or crumbles easily is described by this term.[1]
Answer: What is brittle
In early models, atoms were thought to be indivisible and solid, like tiny spheres, by this scientist.[1]
Answer: Who is Dalton
A neutral atom of oxygen with atomic number 8 has this many electrons.[1]
Answer: What is 8
On the simplified periodic table in your notes, this quantity is shown below the element name.[1]
Answer: What is the atomic mass
Region B contains these reactive metallic elements just to the right of the alkali metals.[1]
Answer: What are alkaline earth metals
Metals generally have this type of surface appearance, which reflects light well.[1]
Answer: What is shiny lustre
Thomson’s model is sometimes called this kind of model because electrons were embedded in a positive “dough.”[1]
Answer: What is the plum pudding model
A neutral atom of magnesium with atomic number 12 has this many protons.[1]
Answer: What is 12?
This term describes the typical electric charges an element’s atoms acquire when forming ions.[1]
Answer: What is ion charge
Region F on the simplified periodic table includes these very unreactive gases.[1]
Answer: What are noble gases
Non-metals are typically this state at room temperature, with some being brittle solids.[1]
Answer: What are gases?
The idea that atoms have a dense, positively charged nucleus surrounded by electrons in space came from this scientist’s work.[1]
Answer: Who is Rutherford
In a neutral atom, this pair of subatomic particle numbers must be equal.[1]
Answer: What are protons and electrons
The periodic table uses different regions to show metals, non-metals, and these “in-between” elements.[1]
Answer: What are metalloids?
Region E on the simplified periodic table contains strongly reactive non-metals, including this family.[1]
Answer: What are the halogens
Metalloids, like silicon, are often used as these in electronics because they conduct only under certain conditions.[1]
Answer: What are semiconductors
Bohr’s atomic model successfully explained the line spectrum of this element before being extended.[1]
Answer: What is hydrogen
The region where electrons move around the nucleus is sometimes called this cloud.[1]
Answer: What is the electron cloud?
The periodic table organizes elements in order of increasing this quantity.[1]
Answer: What is atomic number
The periodic table’s patterns, such as groups of metals and non-metals, are a result of this scientist’s organization.[1]
Answer: Who is Mendeleev?
Metals are good at conducting both of these forms of energy.[1]
Answer: What are heat and electricity