Which one is a property of metals?
Dull
Soft
Poor electrical conductor
Malleable
What are three sub-atomic particles?
Proton, neutron, electron
Proton number is also called ............. number
atomic
Which subatomic particle has positive charge?
Proton
What type of element is bromine?
Non-metal
How many protons are there in this atom?
19
Electron shell has .................. charge
negative
An atom has 8 protons. How many electrons does it have?
8
Atoms form covalent bonds by .................... electrons
sharing
Which one is a compound?
Oxygen
Water
Hydrogen
Sulfur
What is the mass number of Bromine atom with 35 protons and 45 neutrons?
80
What type of element is Carbon?
Non-metal
How many periods are there in a periodic table?
7
Elements have the same number of ......................
protons
Which one below is a noble gas?
Helium
Oxygen
Bromine
Carbon
How many neutrons are there in this atom?
20
Which subatomic particle has negative charge?
Electron
Which particle moves around nucleus?
Electrons
When Oxygen gains 2 electrons, it becomes
O2-
Which one is a compound?
Gold
Silver
Copper
Carbon dioxide
An atom has 6 electrons and 8 neutrons. How many protons does it have?
6
Which pair of elements make covalent bond?
Potassium and Bromine
Oxygen and sodium
Sodium and chlorine
Hydrogen and Oxygen
Nucleus has ...................... charge because it has protons
positive
Metals are on the .................... of the periodic table
left
When atoms lose or gain electrons, they become ..........................
ions
Which pair of elements make ionic bond?
Sodium and potassium
Chlorine and bromine
Sodium and chlorine
Sodium and argon
Which one is an element?
Sugar
Carbon dioxide
Table salt
Bromine
When Na loses 1 electrons, it becomes ................
Na+
Mass number is the total number of ................... and .....................
protons and neutrons
What is the atomic number of oxygen atom with 8 protons?
8
Which one below is an alkali metal?
Bromine
Sodium
Iron
Hydrogen
Which metal is liquid at room temperature?
Mercury
Inside nucleus, there are protons and .............
neutrons
Non-metals are on the .................... of the periodic table
right
How many electrons are there in this atom?
19
Oxygen has 2 electrons in the outer shell. What is the valency of oxgen?
II
Which subatomic particle has no charge?
Neutron
In an atom, what is the relationship between the number of protons and electrons?
Equal/Same
X: 11 protons, Y: 12 electrons, Z: 11 electrons. Which 2 atoms are of the same element?
X and Z
Which one is an element?
Sodium chloride
Alcohol
Gold
Potassium nitrate
What type of element is Iron?
Metal