Grade 10 Science Flashcards
(26 cards)
What is the atomic number of an element?
The number of protons in the nucleus of an atom.
True or False: The mass number is the sum of protons and neutrons in an atom.
True
Fill in the blank: The chemical symbol for Gold is ____.
Au
What is the pH scale used for?
To measure the acidity or alkalinity of a solution.
What is a covalent bond?
A chemical bond formed by the sharing of electrons between atoms.
Which of the following is a noble gas? (A) Oxygen (B) Helium (C) Nitrogen
B) Helium
What is the process of a solid turning into a gas called?
Sublimation
True or False: An ionic bond involves the transfer of electrons.
True
What is the formula for calculating density?
Density = Mass/Volume
Fill in the blank: The main gas responsible for global warming is ____.
Carbon dioxide
What type of reaction involves the breaking down of a compound into simpler substances?
Decomposition reaction
What is the term for the amount of space an object occupies?
Volume
Which particle has a negative charge? (A) Proton (B) Neutron (C) Electron
C) Electron
What is the law of conservation of mass?
Mass is neither created nor destroyed in a chemical reaction.
True or False: Acids turn blue litmus paper red.
True
What is the chemical formula for water?
H2O
What do you call a substance that speeds up a chemical reaction?
Catalyst
Fill in the blank: The smallest unit of an element is called an ____.
Atom
What is a solution?
A homogeneous mixture of two or more substances.
Which of the following is a property of metals? (A) Brittle (B) Conductive (C) Dull
B) Conductive
What is the periodic table?
A table that organizes all known elements by their atomic number and properties.
True or False: All chemical reactions absorb energy.
False
What is an endothermic reaction?
A reaction that absorbs energy from its surroundings.
Which of these is a characteristic of bases? (A) Sour taste (B) Slippery feel (C) Turns red litmus blue
B) Slippery feel and C) Turns red litmus blue
