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What are enzymes and how does our body use them?
All of the above
Endothermic reactions require heat; exothermic reactions release heat.
Atoms have a nucleus composed of neutrons and protons at the center, electrons that fly around the nucleus in shells
Poor metals are very soft, weak and melt easily.
Qualitative analysis is when a scientist uses a variety of methods to determine the components of a substance.
When a substance is oxidized, it gains oxygen or loses hydrogen in a chemical reaction.
All of the above.
All of the above
What is qualitative analysis?
All of the above
Endothermic reactions require heat; exothermic reactions release heat.
Atoms have a nucleus composed of neutrons and protons at the center, electrons that fly around the nucleus in shells
Poor metals are very soft, weak and melt easily.
Qualitative analysis is when a scientist uses a variety of methods to determine the components of a substance.
When a substance is oxidized, it gains oxygen or loses hydrogen in a chemical reaction.
All of the above.
All of the above
What happens to a substance when it is oxidized?
All of the above
Endothermic reactions require heat; exothermic reactions release heat.
Atoms have a nucleus composed of neutrons and protons at the center, electrons that fly around the nucleus in shells
Poor metals are very soft, weak and melt easily.
Qualitative analysis is when a scientist uses a variety of methods to determine the components of a substance.
When a substance is oxidized, it gains oxygen or loses hydrogen in a chemical reaction.
All of the above.
All of the above
What is the difference between exothermic and endothermic reactions?
All of the above
Endothermic reactions require heat; exothermic reactions release heat.
Atoms have a nucleus composed of neutrons and protons at the center, electrons that fly around the nucleus in shells
Poor metals are very soft, weak and melt easily.
Qualitative analysis is when a scientist uses a variety of methods to determine the components of a substance.
When a substance is oxidized, it gains oxygen or loses hydrogen in a chemical reaction.
All of the above.
All of the above
What is the basic structure of an atom?
All of the above
Endothermic reactions require heat; exothermic reactions release heat.
Atoms have a nucleus composed of neutrons and protons at the center, electrons that fly around the nucleus in shells
Poor metals are very soft, weak and melt easily.
Qualitative analysis is when a scientist uses a variety of methods to determine the components of a substance.
When a substance is oxidized, it gains oxygen or loses hydrogen in a chemical reaction.
All of the above.
All of the above
Which of the elements below are essential for life?
All of the above
Endothermic reactions require heat; exothermic reactions release heat.
Atoms have a nucleus composed of neutrons and protons at the center, electrons that fly around the nucleus in shells
Poor metals are very soft, weak and melt easily.
Qualitative analysis is when a scientist uses a variety of methods to determine the components of a substance.
When a substance is oxidized, it gains oxygen or loses hydrogen in a chemical reaction.
All of the above.
All of the above
What are the main characteristics of poor metals and semimetals?
All of the above
Endothermic reactions require heat; exothermic reactions release heat.
Atoms have a nucleus composed of neutrons and protons at the center, electrons that fly around the nucleus in shells
Poor metals are very soft, weak and melt easily.
Qualitative analysis is when a scientist uses a variety of methods to determine the components of a substance.
When a substance is oxidized, it gains oxygen or loses hydrogen in a chemical reaction.
All of the above.
All of the above
What are some typical characteristics of transition metals?
All of the above
Endothermic reactions require heat; exothermic reactions release heat.
Atoms have a nucleus composed of neutrons and protons at the center, electrons that fly around the nucleus in shells
Poor metals are very soft, weak and melt easily.
Qualitative analysis is when a scientist uses a variety of methods to determine the components of a substance.
When a substance is oxidized, it gains oxygen or loses hydrogen in a chemical reaction.
All of the above.
All of the above
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