Atoms (Questions)
How many elements are on the Periodic Table?
116
How many electrons are in Alkaline Earth Metals' outer shell?
2
What is the group number for Alkaline Earth Metals?
2
How many protons does Calcium have?
20
How many electrons does Iron have?
26
What are the group numbers for Transition Metals?
3 through 12
How many elements are Transition Metals?
38
What is the Periodic Table?
A chart that shows all the elements scientists have discovered.
What needs to occur in order for elements to form a compound?
A chemical reaction.
What happens when Alkali Metals are exposed to water?
A huge explosion
What forms when two atoms combine?
A molecule
What is a compound?
A molecule that is formed from two or more different types of atoms.
What is at the center of every atom?
A nucleus
What states of matter do halogens exist in a room temperature?
All 3 states of matter
Oxygen has an atomic number of 8. What can you conclude from this fact?
An atom of oxygen has 8 protons.
How do you find the number of neutrons in an atom?
Atomic Mass Number - Atomic Number
What might happen if the strong force didn't exist?
Atomic nuclei would fly apart.
What can you conclude from the fact that electrons orbit far away from atomic nuclei?
Atoms are comprised mostly of empty space.
Why isn't water on the Periodic Table?
Because it is a compound.
Which is the only halogen that is a liquid?
Bromine
What is changed in an ion?
Electrons
Where are halogens found?
Group 17 to the left of Noble Gases
Which has more protons, sulfur or iodine?
Iodine
Which three elements in Transition Metals can produce a magnetic field?
Iron, cobalt, and nickel
Carbon has an atomic number of 6. What can you conclude about carbon from this fact?
It has six protons.
How is the Periodic Table helpful to scientists?
It helps them find information quickly
What is the significance of periodic table of elements?
It predicts and lists all chemicals known in the universe.
How do you find the number of valence electrons from the periodic table?
It's the group number not including the transition metals
What are the number of dots are outside a Lewis Dot model?
It's the number of valence electrons
To become positively charged, an atom must...
Lose an electron.
What three characteristics of ALL metals?
Malleable, ductile, and good conductors
What are the elements on the left side called?
Metals
What charge would Potassium have if it gained 3 electrons? How many electrons would there be in the ion?
Negative 3; 22 electrons
What is changed in an isotope?
Neutrons
Do Alkali Metals occur freely in nature?
No
Do Alkaline Earth Metals occur freely in nature?
No
Are halogens metals or nonmetals?
Nonmetal
What are the elements on the right side called?
Nonmetals
How many electrons are in the outer shell of Alkali Metals?
One
What charge would Calcium have if it lost 2 electrons? How many electrons would there be in the ion?
Positive 2; 18 electrons
What two types of particles exist within an atomic nucleus?
Protons and neutrons
What are the two most reactive elements of the Alkali Metals?
Sodium and potassium
Are Alkali Metals soft or hard?
Soft
What are valence electrons?
The electrons used to combine with other elements
When scientists see the letters "Au", they know it means "gold". What is Au?
The element symbol.
How can you tell isotopes apart?
The isotopes have different atomic masses.
What does the number next to isotopes signify?
The new atomic mass
What does a subscript tell you?
The number of atoms of a particular element that are in a compound.
In an atom, what is the number of protons equal to?
The number of electrons
What are valence electrons?
The number of electrons on the outer shell
What identifies the element of an atom?
The number of protons
What is unable to be changed in an atom?
The number of protons
Which of the following determines the type of element that an atom makes?
The number of protons
What does an atom's atomic number represent?
The number of protons in an element.
What does each column in the periodic table have in common?
The number of valence electrons
What does the number next to the ions signify?
The oxidation number
The word "atom" comes from a Greek word for "indivisible". In what way are atoms indivisible?
They cannot be broken apart without losing their chemical properties.
What is the role of an electron in an atom?
They circle the nucleus and have a negative charge.
How are molecules different from atoms?
They consist of several atoms bonded together.
Why don't noble gases need to bond?
They have full outer shells.
What do electrons in the same shell have in common?
They have the same amount of energy.
What do the elements in each row have in common?
They have the same number of electron shells.
What do the colors on the Periodic Table show?
Whether the element is a solid, a liquid, or a gas at room temperature.
Are Alkali Metals reactive?
Yes
Are Alkaline Earth Metals reactive?
Yes
Does mercury have more protons and electrons than tin?
Yes
