chapitre 1 Flashcards
L'organisation de la matiere (20 cards)
What are the three states of matter?
Solid, liquid, and gas.
True or False: Atoms are the smallest unit of matter.
True.
Fill in the blank: The _______ is a chart that organizes all known elements.
periodic table.
What is the basic unit of a chemical element?
Atom.
Which state of matter has a definite shape and volume?
Solid.
What is the term for a substance made of only one type of atom?
Element.
Multiple Choice: Which of the following is NOT a state of matter? A) Solid B) Liquid C) Plasma D) Energy
D) Energy.
What is the atomic number of an element?
The number of protons in the nucleus of an atom.
True or False: Gases have a definite volume.
False.
What is the main component of the nucleus of an atom?
Protons and neutrons.
Fill in the blank: The _______ is used to predict the behavior of elements in chemical reactions.
periodic table.
What do we call a molecule that contains two or more different elements?
Compound.
Multiple Choice: Which element is represented by the symbol ‘O’? A) Gold B) Oxygen C) Silver D) Iron
B) Oxygen.
What is a neutron?
A subatomic particle with no charge found in the nucleus of an atom.
True or False: All atoms of an element have the same number of protons.
True.
What is the term for the vertical columns in the periodic table?
Groups or families.
Fill in the blank: Elements in the same group of the periodic table have similar _______.
chemical properties.
What is the significance of the atomic mass?
It is the weighted average mass of an element’s isotopes.
Multiple Choice: Which state of matter has particles that are far apart and move freely? A) Solid B) Liquid C) Gas D) None of the above
C) Gas.
What is an isotope?
Atoms of the same element with different numbers of neutrons.
