Elements
I am often used in balloons. Which element am I?
Helium
Atoms have no overall charge because...
Equal number of protons and electrons
What is the mass of carbon?
What is in a nucleus?
Protons and neutrons
What is the first element on the periodic table?`
Hydrogen
I help strengthen our bones and teeth. What am I?
calcium
How many valence electrons are in oxygen?
6
Define atomic mass
the sum of protons and neutrons in an atom
neutral
Symbol for iron?
Fe
I have 1 oxygen, how many hydrogens do I need to make water?
2
How many electrons are in the second shell in Nitrogen?
5
How do you find atomic weight of an element of the periodic table?
Below the name
I am a negatively charged particle
electron
How do you write the symbol for chlorine?
Cl (must be capital and lower case)
I'm used to kill bacteria in swimming pools. What is my name?
Chlorine
What element am I? I have 76 electrons?
Osmium
My mass number is 31. What is my atomic number and name?
15 and Phosphorus
The circles around the nucleus are called...
shells
The majority of elements in the periodic table are?
Metals
What is the chemical element for the symbol W?
Tungsten
How many neutrons are in Niobium?
51
I have a charge of 1+ and a mass of 1. What am I?
Proton
What is an atom?
Smallest unit of matter
What non-metal group is krypton?
Noble Gases