A period of elements is a horizontal row on the periodic table.
The compound 3CACl2 does not exist. However, if you meant to say 3CaCl2, it would consist of calcium (Ca) and chlorine (Cl) elements.
Chemical properties as they possessed the same number of valence electrons, leading to similar reactivity and bonding behavior. This organization allowed Mendeleev to identify patterns and predict the properties of undiscovered elements.
Hydrogen and oxygen. What is probably meant is which two elements make dihydrogen oxide (water; H2O). The answer remains the same: hydrogen and oxygen.
Spectra lines are specific wavelengths of light emitted or absorbed by elements. Each element has a unique set of spectral lines, which allows scientists to identify elements present in a sample by comparing the observed spectra to known patterns, similar to how fingerprints are unique to individuals.
Radioactive elements are atoms that are unstable and undergo a process called radioactive decay, where they release energy in the form of radiation. This radiation can take various forms such as alpha particles, beta particles, and gamma rays, and can be harmful to living organisms if exposure occurs.
it depends on your body
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is the judicial mayor in yhe soanish colonial preiod
the elements of a poems structure
"Family of elements" is the synonym of group (column) in the periodic table of Mendeleev.
when a cow ( female elephant ) is pregnant, it is called gestation preiod.
Dogs come into heat every 6 months.
Hazards that affect the average condition of a particular place for a preiod of time
these "formed elements" are called the organelles.
Middle English was spoken throughout part of the Plantagenet era 1154 - 1470
I Had my preiod 3 weeks ago could I be pregnant