Valence electrons
How many valence electrons does Hydrogen have?
One valence electron
What is the chemical symbol "O" essential for breathing?
Oxygen.
Which gas is most abundant in Earth's atmosphere?
Nitrogen
Which group on the periodic table contains the alkali metals like lithium and sodium?
Group 1
What family on the periodic table includes highly reactive metals like lithium, sodium, and potassium?
Alkali Metals
How many valence electrons does Carbon have?
Four valence electrons.
What is the element that makes up most of Earth's atmosphere with symbol "N" ?
Nitrogen
What liquid is essential for all known forms of life and covers about 71% of Earth's surface?
Water
Which group contains the noble gases such as helium, neon, and argon?
Group 18
Which family consists of metals that are less reactive than alkali metals?
Alkaline Earth Metals?
What is the number of valence electrons that determines an atom's ability to form these?
Chemical bonds
What is the element with the symbol "Fe" found in steel?
Iron
Which solid metal is known for being a good conductor of electricity and has the symbol "Cu"?
Copper
Which group includes the nitrogen family elements like nitrogen and phosphorus?
Group 15
What family contains elements like fluorine and chlorine, known for being very reactive nonmetals?
Halogens
What is the maximum number of valence electrons an atom can have in its outer shell?
Eight
What is the element with atomic number 79, highly valued for jewelry?
Gold
Which gas is used in balloons because it is lighter than air and non-reactive?
Helium
Which group contains the oxygen family elements such as sulfur?
Group 16
Which family is made up of inert gases, such as helium and neon?
Noble gases
Why are valence electrons important in chemistry?
Because they determine how atoms bond and react with each other.
What is the lightest element with atomic number 1, most abundant in the universe?
Hydrogen
Which solid element is the hardest natural substance and is often used in cutting tools?
Diamond (carbon)
Which group is known as the alkaline earth metals?
Which family contains silicon and other elements important for life and technology?