What is an invasive species and how can it affect an ecosystem​

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Explanation:

An invasive species is an organism that causes ecological or economic harm in a new environment where it is not native. ... Invasive species are capable of causing extinctions of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats.

☁️ Invasive Species: "An invasive species is a non-native species that has become naturalized and negatively alters its new environment. "☁️

☁️ how can it affect an ecosystem​?: "invasive species adversely affect the invaded habitats and bioregions, causing ecological, environmental, and/or economic damage. "☁️

Hope it helps. ￣▽￣❤️

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

that's what i got you can count the number of atoms