What compound is broken down to produce the element used in cans, airplanes, and building materials?
How does atomic mass affect density?
What are the simplest pure substances that cannot be broken down chemically into other substances?
A neutron is a subatomic particle with what charge?
What mixture type is characterized by the settling of particles?
Is silver a solid, liquid, or gas at room temperature?
What is the physical state of mercury at room temperature?
Can atoms be subdivided?
How can you determine if an element is toxic?
How do you calculate the relative formula mass (M) of calcium carbonate? Relative atomic masses C = 12, O = 16, Ca = 40?
How do you determine the number of neutrons in carbon?
Which has a stronger polarising force #Li^+# or #Be^(2+)#?
What are the 3 states of matter by telling their characteristics relating to volume, shape and the particles?
What subshell is partially filled in the transition metals?
Mercury has an atomic number of 80. How many electrons are there in an isotope of mercury-204?
An iron atom has an atomic number of 26 and an atomic mass of 55.8 amu. How many protons does an iron atom have?
How do you identify between salt and sugar?
Name a transition element which has no variable oxidation state?
How can the atomic number of nitrogen be determined?
What are two elements that would have properties similar to beryllium?
How many states of matter exist?
Are most nuclei stable?
The atomic number of an element is based on what?
What are the numbers of the subatomic particles in tin?
Why can hydrogen not be the central atom in a compound?
Which corner of the isotope symbol contains the mass number?
What are the properties of matter?
Are physical changes reversible?
How does an element differ from a compound?
Which of the following make an isoelectronic pair: #Cl^-#, #O^(2-)#, #F#, #Ca^(2+)#, #Fe^(3+)#?
Potassium chlorate decomposes to potassium chloride and oxygen gas. Is this a physical or chemical change?
How many protons, neutrons, and electrons are in #""_19^39 K^(+)#?
How are states of matter related to energy?
What is the formula mass for the following compound #Fe(NO_3)_3#?
How do you find the number of protons and neutrons and electrons of a particular atom, if all you are given is the atomic number and the mass number?
What are some examples of particulate matter?
An atom of chlorine is represented by #""_17^37 Cl#. How many neutrons are in the nucleus of this atom?
How would you explain what an atomic number is?
In a solid, what is the state of the particles?
How are isotopes of elements formed?
What is the mass number of an atom which contains 28 protons, 28 electrons and 34 neutrons?
What is a molecule containing only two atoms?
What is the structural formula of kerosene?
What is a compound consists of two elements?
How do transition elements form ions?
What is the atomic mass in hydrogen?
Why does phosphorus have a low melting point?
What is Radon? Should you worry about it?
Why are the spheres representing nitrogen and oxygen different colors?
Isotopes differ due to the number of what?
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