Atomic Structure
The smallest particle of an element is this.
What is an atom?
These subatomic particles are responsible for the mass of the atom.
What are protons and neutrons?
Elements are arranged by increasing ___________ on the periodic table.
What is atomic number?
This diagram uses the chemical symbol of an element and surrounds it by dots to represent the number of valence electrons.
What is an electron dot diagram?
The current model used and accepted today for an atom is called this.
What is an electron cloud model?
This is the location of protons and neutrons in an atom.
What is the nucleus?
This is an electron's mass in comparison to neutrons and protons.
What is they are 1800 times smaller?
This scientist developed the first periodic table and accurately predicted where undiscovered elements would fit.
Who was Mendeleev?
Elements from group 1 tend to react with elements from this group.
What is group 17?
Bohr's model was different from the current one used because of this.
What is that the electrons travel in fixed orbits?
These subatomic particles have a negative charge.
What are electrons?
This tells the number of protons in an atom's nucleus.
What is the atomic number?
Henry G.J. Moseley arranged all known elements based on increasing __________.
What is atomic number?
These elements on the periodic table are solids at room temperature, can be drawn into wires, pounded into sheets and are good conductors.
What are metals?
This is the diameter of an electron cloud compared to the nucleus.
What is 100,000 times larger in diameter?
These are even smaller particles than protons, neutrons and electrons and actually make up at least protons and neutrons.
What are quarks?
This is how you can calculate the number of neutrons in an atom.
What is subtract the mass number from the atomic number?
Moseley's arrangement helped resolved this problem with the original periodic table.
What is the problem of fluctuating mass?
These elements on the periodic table are poor conductors, they are often gases at room temperature or brittle solids.
What are nonmetals?
This is the number of neutrons in sodium if the atomic number is 11 and the mass number is 23.
What is 12?
This is the number of quarks scientists have officially found.
What is six?
This is how many neutrons copper has if its atomic number is 29 and its mass number is 63.
What is 34?
The horizontal rows on the periodic table are called ____________ and the vertical columns are called ____________.
What are periods and groups?
Oxygen, bromine and carbon are examples of these kinds of elements on the periodic table.
What are nonmetals?
These are the same elements but have different numbers of neutrons.
What are isotopes?