Chemistry Flashcards
What is the first step you should take if you accidentally spill a chemical on your skin?
Wash off area immediately with water and notify teacher.
If a piece of lab equipment is broken what should you do?
Report it to teacher immediately
What’s the correct procedure for smelling a chemical in lab?
Fan a small amount of vapour towards your nose with hand.
What should you do before beginning any lab experiment
Read procedure and safety instructions carefully
Why is it important to tie back long hair in lab?
To prevent ir from catching fire or getting into chemicals
What is the proper way to dispose of unused chemicals
Follow teachers instructions of disposal.
Which of the following is an example of a physical property
A: flammability
B: boiling point
C: reactivity with acid
D: ability to rust
Boiling point
Which of following is a chemical change
A: ice melting into water
B: sugar dissolving into water
C: burning wood into ash
D: breaking a piece of glass
Burning wood into ash
Which observation indicates that a chemical change has occurred
Bubbles are produced without heating
Which of the following is an example of a physical change
A: a metal rusting when exposed to air
B: a piece of paper burning to produce smoke and ash
C: water freezing to form ice
D: food being digested in the stomach
Water freezing to form ice.
Which statement is true about chemical properties?
They describe how a substance reacts with other substances.
The symbol for sodique when its atomic number is 11 how many protons does a sodium atom have?
11
An atom or carbon has an atomic number of 6 and a mass number of 12 how many protons does it have
6
If an atom of chlorine has 17 protons and 18 neutrons what is its atomic mass
35
How many oxygen atoms are in a molecule of H2O
1
