Ciencias Flashcards
(27 cards)
What is an element?
A substance that cannot be broken down into simpler substances by chemical means.
How many elements are currently known?
There are 118 known elements.
What is the atomic number of an element?
The number of protons in the nucleus of an atom of that element.
True or False: All elements are metals.
False
What are periods in the periodic table?
Horizontal rows of elements.
How many periods are in the periodic table?
There are seven periods.
What defines a family (or group) in the periodic table?
Vertical columns of elements that share similar chemical properties.
What is the first element in Period 1?
Hydrogen (H)
Fill in the blank: The elements in Group 1 are known as ______.
Alkali metals
Which element is known as the ‘King of Elements’?
Carbon
True or False: Noble gases are found in Group 18.
True
What are the two main categories of elements?
Metals and nonmetals.
What element is represented by the symbol ‘O’?
Oxygen
Which family of elements is known for being highly reactive?
Alkali metals
What is the last element in Period 2?
Neon (Ne)
Fill in the blank: The elements in Group 17 are known as ______.
Halogens
What is the significance of the periodic table’s arrangement?
It reflects the periodic trends in properties of elements.
True or False: Transition metals are located in the s-block of the periodic table.
False
What is the common property of elements in the same group?
They have similar chemical and physical properties.
What is a metalloid?
An element that has properties of both metals and nonmetals.
What are Lanthanides and Actinides?
Two series of elements that are placed below the main body of the periodic table.
Which element has the highest atomic number?
Oganesson (Og) with atomic number 118.
Fill in the blank: The periodic table is organized by increasing ______.
Atomic number
What element is represented by the symbol ‘Fe’?
Iron
