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WorksheetsAtom, Molecule and Ion
Total questions: 20
Worksheet time: 40mins
What is a molecule?
two elements bonded together (sharing electrons)
a mixture of different substances
smallest individual particles
salt mixed in water
What two subatomic particles are found in the nucleus?
proton and electron
electron and neutron
neutron and proton
neutron and electron
What is an ion?
a charged atom
an atom with different neutrons
atoms with no protons
atoms with no electrons
Which correctly describes the smallest amount of an element?
Atom
Molecule
Compound
Proton
What is an element?
Two or more atoms joined together.
One of over 100 types of atoms
Two or more different elements joined together.
A particle with no charge found in the nucleus of an atom.
How would O2 be qualified. Check all answers that apply.
Atom
Molecule
Compound
The nucleus of an atom is made up of ___________________.
Protons and Neutrino
Neutrons and Electrons
Protons and Neutrons
Protons and Electrons
What charge does an atom have when it GAINS electrons?
Positive
Negative
Neutral
The image shows the periodic grid of potassium. How many electrons are found in the potassium atom?
19
20
39
40
What subatomic particle changes in an ion?
The number of electrons
The number of protons
The number of neutrons
What type of atom is element C?
Normal atom
Ion
Isotope
Which statement correctly describes an electron in an atom?
Electrons stay inside the nucleus and carry a neutral charge.
Electrons circle the nucleus and have a positive charge.
Electrons move around the nucleus and have a negative charge.
Electrons stay inside the nucleus and have a negative charge.
下列何者帶負電？
原子核
質子
電子
中子
原子的質量主要是來自哪兩種粒子？
質子、中子
電子、中子
電子、質子
原子、電子
下列的原子模型中，何者與其他三者並非同一元素？
原子呈電中性表示什麼？ (A) (B) (C) (D)。
質子數＝電子數
質子數＝中子數
中子數＝電子數
質子數＋電子數＝中子數
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