Periodic Table - basics Flashcards
What is the basic building block of all matter?
Atom
How many elements are there in the periodic table?
118
What is the horizontal row in the periodic table called?
Period
What is the vertical column in the periodic table called?
Group
What is the lightest element in the periodic table?
Hydrogen
What is the heaviest naturally occurring element?
Uranium
What does the atomic number of an element represent?
Number of protons in the nucleus
Which element is represented by the symbol ‘Fe’?
Iron
Which element is a noble gas?
Helium
What is the most abundant element in the Earth’s crust?
Oxygen
What is the name of the element with the symbol ‘Na’?
Sodium
What is the chemical symbol for gold?
Au
What is the atomic number of carbon?
6
Which element is essential for human life?
Oxygen
Which element is a halogen?
Fluorine
What is the lightest metal in the periodic table?
Lithium
What is the most reactive non-metal?
Fluorine
What is the chemical symbol for silver?
Ag
What is the atomic number of potassium?
19
Which element is used in light bulbs?
Tungsten
Which element is the second most abundant in the Earth’s crust?
Silicon
What is the atomic number of helium?
2
Which element is a metalloid?
Boron
What is the chemical symbol for lead?
Pb
