The periodic table has over 100 elements. Many of these elements mix together to create different compounds. Knowing about these compounds is important in Year 9 Chemistry.
Let’s look at some of the most common compounds made from these elements. We’ll focus on a few main groups and give examples.
Ionic compounds happen when metals react with non-metals. These compounds have positive ions (called cations) and negative ions (called anions). Here are some important examples:
Sodium Chloride (NaCl): This is better known as table salt. It’s made from sodium (Na) and chlorine (Cl). Each sodium atom gives one electron to a chlorine atom, which creates an ionic bond.
Magnesium Oxide (MgO): This compound is made from magnesium (Mg) and oxygen (O). It’s important for many industrial processes.
Covalent compounds form when non-metals share electrons. Here are some examples:
Water (H₂O): This is made up of two hydrogen (H) atoms and one oxygen atom. Water is essential for life, and its formula shows that it has 2 hydrogen and 1 oxygen atom.
Carbon Dioxide (CO₂): This gas is made from one carbon (C) atom and two oxygen atoms. It is produced when living things breathe and is important for plants during photosynthesis.
Acids and bases are other common compounds in chemistry:
Hydrochloric Acid (HCl): This is a strong acid made from hydrogen and chlorine. It is important for digestion and is used in many industrial processes.
Sodium Hydroxide (NaOH): Known as caustic soda, this is a strong base made from sodium and hydroxide ions. It is often used in making soap and in drain cleaners.
Compounds like NaCl are important for our health. People should get about 2,300 mg of sodium each day.
Water covers about 71% of the Earth and is vital for all known life.
Since the Industrial Revolution, carbon dioxide levels have gone up by about 40%, which affects climate change.
In summary, the most common compounds made from elements in the periodic table include ionic compounds, covalent compounds, and acids and bases. Understanding these compounds and how they form is key in Year 9 Chemistry. This knowledge lays the groundwork for more learning in chemistry and other related subjects.
The periodic table has over 100 elements. Many of these elements mix together to create different compounds. Knowing about these compounds is important in Year 9 Chemistry.
Let’s look at some of the most common compounds made from these elements. We’ll focus on a few main groups and give examples.
Ionic compounds happen when metals react with non-metals. These compounds have positive ions (called cations) and negative ions (called anions). Here are some important examples:
Sodium Chloride (NaCl): This is better known as table salt. It’s made from sodium (Na) and chlorine (Cl). Each sodium atom gives one electron to a chlorine atom, which creates an ionic bond.
Magnesium Oxide (MgO): This compound is made from magnesium (Mg) and oxygen (O). It’s important for many industrial processes.
Covalent compounds form when non-metals share electrons. Here are some examples:
Water (H₂O): This is made up of two hydrogen (H) atoms and one oxygen atom. Water is essential for life, and its formula shows that it has 2 hydrogen and 1 oxygen atom.
Carbon Dioxide (CO₂): This gas is made from one carbon (C) atom and two oxygen atoms. It is produced when living things breathe and is important for plants during photosynthesis.
Acids and bases are other common compounds in chemistry:
Hydrochloric Acid (HCl): This is a strong acid made from hydrogen and chlorine. It is important for digestion and is used in many industrial processes.
Sodium Hydroxide (NaOH): Known as caustic soda, this is a strong base made from sodium and hydroxide ions. It is often used in making soap and in drain cleaners.
Compounds like NaCl are important for our health. People should get about 2,300 mg of sodium each day.
Water covers about 71% of the Earth and is vital for all known life.
Since the Industrial Revolution, carbon dioxide levels have gone up by about 40%, which affects climate change.
In summary, the most common compounds made from elements in the periodic table include ionic compounds, covalent compounds, and acids and bases. Understanding these compounds and how they form is key in Year 9 Chemistry. This knowledge lays the groundwork for more learning in chemistry and other related subjects.