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How many periods are there in a periodic table?
7
Which one below is a noble gas?
 
Helium
 
Carbon
 
Oxygen
 
Bromine
Which one below is an alkali metal?
 
Sodium
 
Bromine
 
Hydrogen
 
Iron
Which metal is liquid at room temperature?
Mercury
Which one is a property of metals?
 
Malleable
 
Dull
 
Poor electrical conductor
 
Soft
Non-metals are on the .................... of the periodic table
right
Metals are on the .................... of the periodic table
left
What type of element is bromine?
Non-metal
What type of element is Iron?
Metal
What type of element is Carbon?
Non-metal
What is the mass number of Bromine atom with 35 protons and 45 neutrons?
80
What is the atomic number of oxygen atom with 8 protons?
8
How many neutrons are there in this atom?
20
How many electrons are there in this atom?
19
How many protons are there in this atom?
19
Mass number is the total number of ................... and .....................
protons and neutrons
Proton number is also called ............. number
atomic
X: 11 protons, Y: 12 electrons, Z: 11 electrons. Which 2 atoms are of the same element?
X and Z
An atom has 6 electrons and 8 neutrons. How many protons does it have?
6
An atom has 8 protons. How many electrons does it have?
8
Electron shell has .................. charge
negative
Nucleus has ...................... charge because it has protons
positive
Elements have the same number of ......................
protons
In an atom, what is the relationship between the number of protons and electrons?
Equal/Same
Which particle moves around nucleus?
Electrons
Inside nucleus, there are protons and .............
neutrons
Which subatomic particle has no charge?
Neutron
Which subatomic particle has negative charge?
Electron
Which subatomic particle has positive charge?
Proton
What are three sub-atomic particles?
Proton, neutron, electron
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